Mission:Mapping Deep-Water Areas Southeast of Bermuda in Support of the Galway Statement on Atlantic Ocean Cooperation
Date: July 31, 2018
Air Temperature: 28°C
Wind Speed: 4.2 knots
We returned to Norfolk this morning and successfully completed our expedition! It is definitely bittersweet to be concluding our work at sea since our team aboard the Okeanos was comprised of such wonderful people. We grew to be really close and truly enjoyed each other’s company.
These past couple weeks at sea have been an incredible experience and I am excited to share what I have learned with the Peddie community. Being aboard the “America’s Ship for Ocean Exploration” and mapping a region of the seafloor that has not been studied yet was a very exciting opportunity as both a scientist and educator. I plan on creating and teaching a Marine Science elective during the Spring of 2019. Data collected from the expedition will be utilizedto design classroom activities, laboratory experiments, and cross-curricularmaterials that directly relate to the research completed. Students will understand the importance of exploration and be encouraged to discover, inform, and educate others about the ocean. Since the Okeanos is equipped with telepresence capabilities, I will be able to stream seafloor images, ROV dives, and interviews from sea in my classroom. Having students directly engaged with those completing research in real time will enable them to make associationsbetween the ocean and their local ecosystems to put the research intocontext.
I really enjoyed meeting everyone aboard and listening to their stories. Since these vessels require 24/7 operations, many people worked very hard over the course of the expedition to ensure that everything was going as planned. The crew, stewards, engineers, NOAA Officers, scientists, and explorers in training were very willing to share their knowledge, insights, and experiences. I respect their dedication and flexibility while at sea and I am very grateful to have met such awesome people! This experience was definitely one of the highlights of my teaching career and I am very inspired to know that no matter where in the world the Okeanos is located, everyone aboard is committed to understanding the wonders of the unknown ocean.
NOAA Teacher at Sea Cindy Byers Aboard NOAA Ship Fairweather April 29 – May 13
Mission: Southeast Alaska Hydrographic Survey
Geographic Area of Cruise: Southeast Alaska
Date: May 11, 2018
Weather from the Bridge:
Latitude:57°43.3 N Longitude:133°35.5 W Sea Wave Height: 0 Wind Speed: 5 knots Wind Direction: variable Visibility:3 nautical miles Air Temperature: 11.5°C Sky:100% cloud coverage
Science and Technology Log
The area that NOAA Ship Fairweather is surveying is Tracy Arm and Endicott Arm. These are fjords, which are glacial valleys carved by a receding (melting) glacier. Before the surveying could begin the launches(small boats) were sent up the fjords, in pairs for safety, to see how far up the fjord they could safely travel. There were reports of ice closer to the glacier. Because the glacier is receding, some of the area has never been mapped. This is an area important for tourism, as it is used by cruise ships. I was assigned to go up Endicott Arm towards Dawes Glacier.
Almost as soon as we turned into the arm, we saw that there was ice. As we continued farther, the ice pieces got more numerous. We were being very careful not to hit ice or get the launch into a dangerous place. The launch is very sturdy, but the equipment used to map the ocean floor is on the hull of the boat and needs to be protected. We were able to get to within about 8 kilometers of the glacier, which was very exciting.
The launches have been going out every day this week to map areas in Tracy Arm. I have been out two of the days doing surveying and bottom sampling. During this time I have really enjoyed looking at the glacial ice. It looks different from ice that you might find in a glass of soda. Glacial ice is actually different. It is called firn. What happens is that snow falls and is compacted by the snow that falls on top of it. This squeezes the air out of of the snow and it becomes more compact. In addition, there is some thawing and refreezing that goes on over many seasons. This causes the ice crystals to grow. The firn ends up to be a very dense ice.
Glaciers are like slow moving rivers. Like a river, they move down a slope and carve out the land underneath them. Glaciers move by interior deformation, which means the ice crystals actually change shape and cause the ice to move forward, and by basal sliding, which means the ice is sliding on a layer of water.
The front of a glacier will calve or break off. The big pieces of ice that we saw in the water was caused by calving of the glacier. What is also very interesting about this ice is that it looks blue. White light, of course, has different wavelengths. The red wavelengths are longer and are absorbed by the ice. The blue waves are shorter and are scattered. This light does not get far into the ice and is scattered back to your eyes. This is why it looks blue.
Meltwater is also a beautiful blue-green color. This is also caused by the way that light scatters off the sediment that melts out of the glacial ice. This sediment, which got ground up in the glacier is called rock flour.
Mapping and bottom sampling in the ice
NOAA Ship Fairweather has spent the last four days mapping the area of Tracy Arm that is accessible to the launches. This means each boat going back and forth in assigned areas with the multibeam sonar running. The launches also stop and take CTD (Conductivity, Temperature and Depth) casts. These are taken to increase the accuracy of the sound speed data.
Today I went out on a launch to take bottom samples. This information is important to have for boats that are wanting to anchor in the area. Most of the bottom samples we found were a fine sand. Some had silt and clay in them also. All three of these sediment types are the products of the rocks that have been ground up by ice and water. The color ranged from gray-green to tan. The sediment size was small, except in one area that did not have sand, but instead had small rocks.
The instrument used to grab the bottom sediment had a camera attached and so videos
were taken of each of the 8 bottom grabs. It was exciting to see the bottom, including some sea life such as sea stars, sea pens and we even picked up a small sea urchin. My students will remember seeing a bottom sample of Lake Huron this year. The video today looked much the same.
I have seen three bears since we arrived in Holkham Bay where the ship is anchored. Two of them have been black. Today’s bear was brown. It was very fun to watch from our safe distance in the launch.
I have really enjoyed watching the birds too. There are many waterfowl that I do not know. My students would certainly recognize the northern loons that we have seen quite often.
I have not really talked about the three amazing meals we get each day. In the morning we are treated to fresh fruit, hot and cold cereal, yogurt, made to order eggs, potatoes, and pancakes or waffles. Last night it was prime rib and shrimp. There is always fresh vegetables for salad and a cooked vegetable too. Carrie is famous for her desserts, which are out for lunch and dinner. Lunches have homemade cookies and dinners have their own new cake type. If we are out on a launch there is a cooler filled with sandwich fixings, chips, cookies, fruit snacks, trail mix, hummus and vegetables.
The cereal and milk is always available for snacks, along with fresh fruit, ice cream, peanut butter, jelly and different breads. Often there are granola bars and chips. It would be hard to ever be hungry!
Geographical Area of the Cruise: along the coast of Alaska
Date: June 13, 2016
Weather Data from the Bridge:
Latitude: 55˚ 10.643′ N Longitude: 132˚ 54.305′ W Air Temp: 19˚C (66˚F) Water Temp: 14˚C (58˚F) Ocean Depth: 33 m (109 ft.) Relative Humidity: 50% Wind Speed: 6 kts (7 mph) Barometer: 1,014 hPa (1,014 mbar)
Science and Technology Log:
In the last post, I talked about how we collect the hydrographic data. The process of hydrographic data collection can be a challenge in of itself with all of the issues that can come up during the process. But, what happens to this data once it is brought back to the Fairweather? In many ways this is where the bulk of the work begins in hydrography. As each boat files back to the ship, the data they bring back is downloaded onto our servers here on the ship to begin processing. Just the process of downloading and transferring the information can be time consuming since some data files can be gigabytes worth of data. This is why the Fairweather has servers with terabytes worth of storage to have the capacity to store and process large data files. Once the data is downloaded, it is manually cleaned up. A survey technician looks at small slices of hydrographic data and tries to determine what is the actual surface of the bottom and what is noise from the multibeam echosounder. Leaving too many false data points in the slice of hydrographic data may cause the computer software to adjust the surface topography to reach up or below to something that in reality does not exist. The first phase of this is focused on just cleaning the data enough to prevent the hydrographic software from recognizing false topographies. Even though the data that does not likely represent accurate hydrographic points are flagged and temporarily eliminated from the topographic calculation, the flagged data points are retained throughout the process to allow for one to go back and see what was flagged versus what was retained. It is important to retain this flagged data through this process in case data that was thought to be noise from the echosounder really did represent a surface feature on the bottom.
Once this process is complete, the day’s section is added to a master file and map of the target survey area. This needs to happen on a nightly basis since survey launches may need to be dispatched to an area that was missed or one in which the data is not sufficient to produce quality hydrographic images. Each launch steadily fills in the patchwork of survey data; so, accounting for data, quality, and location are vitally important. Losing track of data or poor quality data may require another launch to cover the same area. After the survey area is filled in, refinement of the new map takes place. This is where the crude cleanup transitions into a fine-tuned and detailed analysis of the data to yield smooth and accurate contours for the area mapped. Data analysis and processing are the parts of hydrographic work that go unnoticed. Since this work involves many hours using cutting-edge technology and software, it can be easy to underappreciate the amount of work survey technicians go through to progress the data through all of these steps to get to a quality product.
Dear Mr. Cody,
Today we docked in Hoonah, Alaska. We had a whale show right under our balcony! They are incredible to watch. There is so much to see for wildlife in Alaska. (Dillion is one of my science students who went on an Alaska cruise with his family in May and will be corresponding with me about his experiences as I blog about my experiences on the Fairweather.)
I know what you mean about the wildlife. I am seeing wildlife all over the place too. On our transit to our survey site from Juneau, I saw numerous marine mammals: hump back whales, dolphins, and killer whales. On our last survey launch, we had two humpbacks stay within site of the boat the entire morning. They are remarkable creatures. Whenever we locate a marine mammal, we fill out a marine mammal reporting form allowing various interests to use these reports to estimate the population size and range of these animals. The waters off the Alaskan coast are full of marine life for a reason. It is a major upwelling area where nutrients from the ocean bottom are being forced up into the photic zone where organisms such as phytoplankton can use both the nutrients and sunlight to grow. This provides a large amount of feed for organisms all the way up the food chain. This area is also known for its kelp forests. Yes, if you were on the sea bottom in these areas dominated by kelp, it would look like a forest! Kelp are a very long- and fast-growing brown algae that provide food and habitat for many other marine organisms.
Did You Know?
The RESON 7125sv multibeam echosounders found onboard the survey launches use a 200 kHz or 400 kHz sound frequency. This means the sound waves used fully cycle 200,000 or 400,000 times per second. Some humans can hear sounds with pitches as high as 19 kHz while some bat and dolphin species can hear between 100 and 150 kHz. No animal is known to have the capability to audibly hear any of the sound waves produced by the multibeam onboard our survey boats. Animals that use echolocation tend to have much higher hearing ranges since they are using the same premise behind acoustic mapping in hydrography but to detect food and habitat.
Can You Guess What This Is?
A. a marker buoy B. a water purification system C. an electric bilge pump D. a CTD sensor
The answer will be provided in the next post!
(The answer to the question in the last post was A. a search and rescue transponder. If a launch boat were to become disabled with no means of communication or if the boat needs to be abandoned, activating a search and rescue transponder may be the only available option left for help to find someone missing. When the string is pulled and the cap is twisted, a signal for help is sent out in the form of 12 intense radar screen blips greatly increasing the odds for search and rescue to find someone in a timely manner. The radar blips become arcs as a radar gets closer to the transponder until the radar source gets within a nautical mile in which the arcs become full circles showing rescue crews that the transponder is nearby.)
NOAA Teacher at Sea Jeanne Muzi Aboard NOAA Ship Thomas Jefferson August 2 – 8, 2015
Mission: Hydrographic Survey Geographical area of cruise: North Atlantic Date: August 10, 2015
As I head home to New Jersey a few days ahead of schedule, I am reflecting on what I have learned aboard the Thomas Jefferson. From day one, I was asking questions and trying to understand the process of hydrographic surveying, the equipment used and the different roles of everyone involved in the process. I learned why hydrographic surveying is so important and why the mission of NOAA (Science, Service and Stewardship) is demonstrated in all the research and activities aboard the Thomas Jefferson.
The ocean covers 71 percent of the Earth’s surface and contains 97 percent of the planet’s water, yet more than 95 percent of the underwater world remains unexplored. NOAA protects, preserves, manages and enhances the resources found in 3.5 million square miles of coastal and deep ocean waters.
The oceans are our home. As active citizens, we must all become knowledgeable, involved stewards of our oceans.
As my Teacher at Sea experience ends, I wanted to make sure I shared some of the conversations I had with the officers charged with leading the missions of the Thomas Jefferson and the hydrographic work it is involved in.
It is my honor to introduce to you:
Captain Shepard Smith (CO)
Captain Smith grew up on the water in Maine. He always enjoyed reading maps and charts. He received a Bachelor’s of Science degree in mechanical engineering from Cornell University and earned a Master’s of Science degree from the University of New Hampshire Ocean Engineering (Mapping) Program. He has worked at NOAA in many different capacities.
He served aboard NOAA Ship Rainier, NOAA R/V Bay Hydrographer and the Thomas Jefferson. He was also the chief of Coast Survey’s Atlantic Hydrographic Branch in Norfolk, Virginia. Captain Smith also served as Senior Advisor to Dr. Kathryn Sullivan, NOAA Deputy Administrator and as Chief of Coast Survey’s Marine Chart Division. Captain Smith explained how he has been involved in integrating many new technological innovations designed to improve the efficiency of NOAA’s seafloor mapping efforts. It was through Captain Smith’s endeavors that Americans enjoy open access to all NOAA charts and maps.
He enjoys being the CO very much and feels the best part of his job is developing the next generation of leadership in NOAA. He feels it is very important to have that influence on junior officers. The worst part of his job is the separation from his family.
Captain Smith’s advice to young students is to pay attention to the world around you and how things work. Try to ask lots of questions. He said, “There are loads of opportunities to be the best at something and so many things to learn about. There are new fields, new ideas and new ways to see and understand things. Never limit yourself.”
Lieutenant Commander Olivia Hauser (XO)
LCDR Hauser grew up in New Jersey and always loved learning about the ocean. As a little girl, she thought she would like to study Marine Science but wasn’t sure how. She grew up and earned her Bachelor’s of Arts in Biology from Franklin and Marshall College and her Master’s of Science in Biological Oceanography from the University of Delaware’s College of Marine Studies. Before coming to NOAA, LCDR Hauser spent time working for a mortgage company, which provided her with different kinds of skills. She soon started officer training for NOAA and got to apply the sonar knowledge she developed in graduate school to her NOAA work. She has served on the NOAA ships Rainier and Thomas Jefferson. She has built her strong background in hydrography with both land and sea assignments. She has been Field Operations Officer, Field Support Liaison and Executive Officer. She explained that in the field of hydrographic surveying, experience is key to improving skills and she is always trying to learn more and share her knowledge. As XO, she is the second highest-ranking officer on the ship.
LCDR Hauser feels the best part of her job is that it never gets boring. Everyday is different and there are always new things to see and learn.
LCDR Hauser also explained that the hardest part of the job is the transitions, that come pretty frequently. She said, “You may find yourself leaving a ship or coming to a new job. There are always new routines to learn and new people to get to know. With so many transitions, it is often hard to find and keep community, but on the positive side, the transitions keep you adaptable and resilient, which are important skills too.”
Her advice to young students is “Take opportunities! Explore things you never heard of. Don’t give up easily! Even the rough parts of the road can work for you. Every experience helps you grow! Keep asking questions…especially about how and why!”
Lieutenant Joseph Carrier (FOO)
As a young boy, LT Carrier was the kind of kid who liked to take things apart and put them back together. He joined the Navy right out of high school. When he got out, he attended University of North Carolina at Wilmington and studied biology as an undergraduate and marine science in graduate school. He taught biology, oceanography, and earth science at a community college and worked at NOAA’s Atlantic Hydrographic Branch in Norfolk, VA before attending officer training. He served on other NOAA ships before coming to the Thomas Jefferson and has learned a lot about the technical aspects of hydrographic surveying, data collection and processing while onboard. He is currently the Field Operations Officer.
LT Carrier feels the best part of his job is the great people he works with. He explained that on a ship you are part of a close family that works together, lives together and helps each other.
He said the hardest parts of the job are the long hours and missing his family very much.
His advice to younger students is don’t get discouraged easily. He explained, “If you are not good at something at first, try again. Know that each time you try something…you have an opportunity to get better at it. Everyone can overcome challenges by working hard and sticking with it!
The experience of living and learning on the Thomas Jefferson will stay with me and impact my teaching as I continue to encourage kids to stay curious, ask questions and work hard!
I would like to thank everyone at NOAA’s Teacher at Sea program for enabling me to come on this adventure! My time as a TAS has provided me with authentic learning experiences and a new understanding of science and math in action. I would like to thank every person serving on the Thomas Jefferson who took the time to talk with me and shared his or her area of expertise. I appreciated everyone’s patience, kindness and friendly help as they welcomed me into their home. Every crewmember has given me stories, knowledge and information that I can now share with others.
In my last blog entry the Question of the Day and Picture of the Day was:
What is this and what do the letters mean?
These containers are life rafts. The letters “SOLAS” stand for “Safety of Life at Sea.”
The First SOLAS Treaty was issued in 1914, just two years after the Titanic disaster. The Treaty was put in place so countries all around the world would make ship safety a priority. The SOLAS Treaty ensures that ships have safety standards in construction, in equipment onboard and in their operation. Many countries have turned these international requirements into national laws. The first version of the treaty developed in response to the sinking of the Titanic. It stated the number of lifeboats and other emergency equipment that should be available on every ship, along with safety procedures, such as having drills and continuous radio watch. Newer versions of the SOLAS Treaty have been adopted and the guidelines are always being updated so people at sea remain safe. If there was an emergency on the Thomas Jefferson, the crew is prepared because they have practiced many different drills. If these lifeboats were needed they would be opened, inflated and used to bring everyone to safety.
Many thanks for reading about my Teacher at Sea Adventure!
NOAA Teacher at Sea Jeanne Muzi Aboard NOAA Ship Thomas Jefferson August 2 – 8, 2015
Mission: Hydrographic Survey Geographical area of cruise: North Atlantic Date: August 8, 2015
Weather Data From the Bridge: Temperature: 73°F (23°C) Fair
Wind Speed: N 10 mph
Barometer: 29.94 in (1013.6 mb)
Dewpoint: 58°F (14°C)
Visibility: 10.00 mi
Science and Technology Log:
It is amazing that with hydrography, scientists can “look” into the ocean to “see” the sea floor by using sound.
All the data collected by the TJ, and other NOAA Hydro ships, is used to update nautical charts and develop hydrographic models.
This is important work because the charts are used to warn mariners of dangers to navigation, which can mean everything from rocks to ship wrecks. They also record tide or water level measurements to provide information about water depths. Surveys also help determine if the sea floor is made up of sand, mud or rock, which is important for the anchoring of boats, dredging, construction, and laying pipeline or cables. Hydrography also provides important information for fishery habitats.
The work being done on the Thomas Jefferson is a great example of STEM in action since hydrographic surveying combines science, lots of technology, the engineering of new devices and procedures, and the application of mathematical computations.
Here are two amazing survey images:
A few of my students emailed me yesterday to ask how does the information gathered out on the launch become a chart. That’s a great question!
My XO (Executive Officer) LCDR Olivia Hauser provided me with a great explanation of how the data becomes a chart. She explained it this way:
It starts with deciding where to survey, and ends with an updated chart that is published and available for mariners to use. The decision where to survey is steered by a document called the National Hydrographic Survey Priorities document. It outlines where the top priorities to survey are based on the type of ship traffic that travels the area, the age of the survey in the area, how often the seafloor changes in the area, and specific requests from port authorities, the US Coast Guard, and other official maritime entities. Please see the following link for more information. http://www.nauticalcharts.noaa.gov/hsd/NHSP.htm
The operations branch of the Hydrographic Surveys Division of the Office of Coast Survey in NOAA (where Patrick works-see below) uses this document to decide where the ship will survey next. This branch then provides the ship with project instructions that identifies where the work will be done and divides the survey area into manageable chunks.
The data is raw when we first acquire it, and once it comes back to the ship, we need to apply some correctors to it, to improve the data quality.
One corrector we apply to the data is tide information. The water gets shallower and deeper depending on the stage of tide, and we need to make sure the depths on the chart are all relative to the same stage of tide.
Another corrector we apply to the data is vessel motion. When we acquire depth data with the sonar, the boat is moving with the waves, and the raw data looks like it has waves in the seafloor, too. We know that is not the case, so we take the motion data of the boat out of our depth data.
A third corrector we apply to the data is sound speed. The sonar finds the depth of the seafloor by sending a pulse of sound out and listening for its return, measuring the time it takes to complete that trip. We also measure the speed of sound through the water so we can calculate the depth (see the picture of ENS Gleichauf deploying the CTD to measure sound speed). Speed =Distance/Time. Speed of sound through typical seawater is 1500 meters per second. The speed of sound changes with water temperature and salinity (the saltiness of the water) .If we measure the time it takes for the sound to get to the seafloor and back, 1 second for example, and the sound speed is 1500 meters per second we know the seafloor is 750 meters away from the sonar. (the sound is traveling two ways).
Once all of the correctors are applied to the data, a digital terrain model (DTM) is created from the data to make a grid showing the depths and hazards in the area. A report is written about the survey, and it is submitted to the Atlantic Hydrographic Branch (Where Jeffrey works- See below). This branch reviews the data and makes sure it meets NOAA’s specifications for data quality. They also make a preliminary chart, picking the important depths and hazards that should be shown on the chart.
Once the data has been reviewed, it goes to the Marine Charting Division. This group takes the preliminary chart of the area surveyed, and adds it to the official chart that is being updated. These charts are then distributed to the public.
I had a chance to talk with some of the Survey Techs and project scientists who work on the TJ to find out more about their jobs.
Allison Stone is the Hydro Senior Survey Technician (HSST). When Allison was 12 years old she clearly remembers her school’s Career Day, when lots of parents came in to talk about their jobs. She recalls there was one mom who had a sparkle in her eye when she talked about her job. She was an Oceanographer. That mom became her advisor when she attended the College of Charleston. Allison had an internship at the Atlantic Hydrography Branch in Norfolk and she first came to the TJ as a Student Scientist. She later became a full time technician. She enjoys her job because she gets the opportunity to observe the seafloor like no one has ever seen it before. She gets to solve problems and think outside the box. When she is going through raw data, she is able to make connections and interpret information. The work is interesting and challenging. Allison’s advice for young students is to keep being passionate about things you are interested in. Try to find out more and stay flexible. Try to volunteer as much as possible as you grow up so you can find out what you like to do and love to work on.
Jeffery Marshall was visiting the TJ for a project during my time aboard. Jeffery is a Physical Scientist with the Office of Coast Survey as a member of the Hydrographic Surveys Division, Atlantic Hydrographic Branch in Norfolk, Virginia. Jeffery grew up on the Jersey Shore and loved being out on the water, down at the beach and learning about the ocean. He loved surfing and was always wondering what the weather would be like so he could plan for the waves and the tides. So when he went to college, he studied meteorology. Following graduation, he taught middle school science and loved being a teacher. When he was ready for a change, he decided to attend graduate school and got his masters degree in Coastal Geology. He really enjoys having the opportunity to get out on the ships. His job is usually applying the processed data to charts, what he calls “Armchair Hydrography.” When he gets a chance to work on a NOAA ship mission, he has more opportunities to collect and analyze data. Jeff’s advice to young students is to read a lot and think about lots of different things, like how we use maps. He thinks everyone should take a look at old maps and charts, and think about how they were made. He encourages students to look for patterns in nature and to think about how rocks and sand change over time.
Patrick Keown is also a Physical Scientist. He was also working on a project on the TJ. Patrick works at the Operations Branch of the Hydrographics Survey Division in Silver Spring, Maryland. Patrick is usually working on plans for where surveying needs to take place. He started college as an Anthropology major but ended up in a Geographic Information Systems class and found that it came easily to him. Geographic Information Systems are designed to capture, store, manipulate, analyze, manage, and present all types of spatial or geographical data. He had an internship with the Army Corp of Engineers which provided some “on the job learning” of hydrography. When Patrick was young, he didn’t have the chance to travel much, so he spent a lot of time looking at maps and wondering, “What else is out there?” Now he loves to travel and likes to look at what he calls “Social Geography.” Patrick thinks the best part of his job is the chance to experience new things. He has had opportunities to try the latest technology and is inspired by all the new types of equipment, like drones and the Z boats. Patrick’s advice to young learners is “Never be afraid to explore! Never be afraid to ask questions! Most importantly, stay curious!!”
Cassie Bongiovanni is a GIS Specialist who works at The Center for Coastal and Ocean Mapping/Joint Hydrographic Center. The center is a partnership between the University of New Hampshire and NOAA, and it has two main objectives: to develop tools to advance ocean mapping and hydrography, and to train the next generation of hydrographers and ocean mappers. Cassie grew up in Texas and did not like science at all when she was young. She attended the University of Washington in Seattle and fell in love with the ocean. She received her Bachelors of Science in Geology with a focus in Oceanography. She is now working with NOAA’s Integrated Ocean and Coastal Mapping group on processing lidar and acoustic data for post Hurricane Sandy research efforts. Cassie explained that she loves her work because she loves to learn! She has lots of opportunities to ask questions and discover new things. The kid in her loves making maps and then coloring them with bright colors to create 3-D images of things like shipwrecks.
The launch headed out again today to try to find a ship that sank earlier in the summer. Information was gathered and lines were surveyed, but so far no shipwreck was found. The day ended with a beautiful sunset.
In my last blog entry the Question of the Day was:
How was the ocean floor mapped before sonar was invented?
Mariners have used many different methods to map the ocean floor to try to “see” what was under the water. For thousands of years a stick was used to see how deep the water was. Eventually, the stick was marked with measurements. Once ships started exploring the oceans, sticks were no longer good options for finding out the depth of water or if anything was under the water that could harm the ship. Sailors started tying a rope around a heavy rock and throwing it over board. In the 1400’s, mariners began using lead lines, which were marked lengths of rope attached to a lead weight. The lead line was good for measuring depth and providing information about the sea floor. The standard lead line was 20 fathoms long–120 feet–and the lead weighed 7 pounds. In the early 20th century, the wire drag was invented. This meant two ships had a set system of wires hung between them and it enabled mariners to find hidden rocks, shipwrecks or other hazards hidden in the water.
In my last entry, The Picture of the Day showed Ensign Gleichauf lowering an instrument into the water. That is a CTD, which stands for conductivity, temperature, and depth. A CTD is made up of electronic instruments that measure these properties. The CTD detects how the conductivity and temperature of the water column changes as it goes deeper into the water. Conductivity is a measure of how well a solution conducts electricity. Conductivity is directly related to salinity, which is how salty the seawater is.
Today’s Question of the Day and Picture of the Day: What is this and what do the letters mean?
NOAA Teacher at Sea Jeanne Muzi Aboard NOAA Ship Thomas Jefferson| August 2 – 13, 2015
Mission: Hydrographic Survey
Geographical area of cruise: North Atlantic Date: August 5, 2015
Weather Data From the Bridge: Temperature: 71° F (22° C)
Wind Speed: S 5 mph
Barometer: 29.89 in (1012.1 mb)
Dewpoint: 66° F (19° C)
Visibility: 10.00 mi
Science and Technology Log:
One important thing that every single person has to face, no matter how old they are or what kind of job they have, is what to do when things go wrong. We are always happy when things are going smoothly—but what do you do when they don’t?
I found out about how important it is to be a thinker and problem solver on the Thomas Jefferson because we are experiencing engine problems. First the launches were not running. Then the TJ’s engines were having difficulties and it was discovered that we had water in our fuel. The engineers and officers all started to ask questions: Where is the water coming from? Is there a problem with the tanks? How are we going to fix this situation? What is the best solution right now? It was determined that we should sail into the Naval Base in Newport, Rhode Island so the fuel could be pumped out and the fuel tanks examined. This is a big job!
We sailed into Newport on a beautiful sunny afternoon. I got to spend some time on the bridge and watched as Ensign Seberger and GVA (General Vessel Assistant) Holler steered our large ship around obstacles like lobster pots and small sailboats. AB (Ablebodied Seaman) Grains acted as the look out, peering through binoculars and calling out directions in degrees (instead of feet or yards), and port and starboard (instead of left and right). LTJG Forrest explained how to chart the route to Newport using a compass, slide rule and mathematical calculations. His computations were right on as he plotted the course of the Thomas Jefferson.
When we arrived at Newport, the tugboat, Jaguar, needed to help us dock and then the gangway was lifted into place using a crane.
Now we are waiting in Newport to see how the ship will be repaired, and how that will impact the surveying mission and the work of all the scientists on board. The fuel is currently being pumped out of the tanks so the engineering department can figure out what is going on.
Some of my students have emailed to ask where am I sleeping. When you are aboard a ship, you sleep in a stateroom. I have the bottom bunk and my roommate has the top. We have storage lockers and shelves to hold our stuff. The bathroom (called the head) connects our stateroom with another room.
Everyone eats in the Mess. You pick up your hot food on a plate in front of the galley and then sit down to eat at a table. Some of our meals so far have been omelets and cereal for breakfast, shrimp, rice and vegetables for lunch, and fish and potatoes for dinner. There is always a salad bar. Yogurt and ice cream are available, along with lots of different drinks.
The passageways are pretty narrow around the ship and the stairs going from one deck to another are steep whether you are inside or outside.
Everything on a ship must be well-organized so equipment can be found quickly and easily.
The view from the outside deck has been beautiful…
The last Question of the Day was: What do the letters XO mean on the hardhat of the person in the center of this picture?
XO stands for Executive Officer. Our Executive Officer is Lieutenant Commander Olivia Hauser. She is the second in command on board.
The last Picture of the Day showed this image:
This image was captured with sonar and shows a whale swimming in the ocean. Amazing!
NOAA Teacher at Sea Jeanne Muzi Aboard NOAA Ship Thomas Jefferson August 2 – 13, 2015
Mission: Hydrographic Survey Geographical area of cruise: North Atlantic Date: August 3, 2015
Weather Data From the Bridge:
Temperature Fair 81°F (27°C)
SW 12 mph
29.87 in (1011.4 mb)
Greetings from the Thomas Jefferson!
Science and Technology Log:
Now that I am onboard, I am trying to learn as much as possible. The TJ is a busy place and there are lots of jobs to be done. Basically there are separate groups working in different ways, like the Wardroom (which means all the officers on board), Engineering, Deck, Survey and Stewards, but everyone always comes together to work as a team.When one of the small launches returned to the ship late yesterday afternoon, everyone worked together to get it back on board safely. The launch had been surveying and now that data had to be processed in the survey dept.
In the survey dept. there are different scientists working on different projects. This is a station for “Data Acquisition” so there are multiple computers and cameras sharing images, data and information from around the ship and from the sonars.
Survey Technician Stephanie Stabile created this “big picture” diagram, which explains how the different scanning tools communicate with each other to provide the most accurate scans of the ocean floor.
This picture shows how a survey ship uses its multi-beam sonar.
If you would like to learn more about sonar, check out this video:
I also had a chance to visit the bridge today as the anchor was lifted. I learned how orders are given clearly and information communicated accurately. Lieutenant Commander Hauser gave me a tour of the ship and answered many of my questions. She explained how the national flag is hoisted to the highest position when the ship gets underway.
One of the most important things I learned about today was safety!
Think about why we have fire and evacuation drills at school…It is important to be prepared just in case something happens! It is exactly the same here on the Thomas Jefferson! I was part of a group that was trained on safety issues like fire, abandoning ship and what to do in any emergency. Ensign Perry walked us around the ship and showed us where life jackets, fire extinguishers, steel-toed shoes and hard hats are located. She also taught me how to get in and out of a survival suit. Survival suits (also called “Gumby suits”) are made of foam rubber and are designed to be watertight. They help protect against hypothermia and can keep a person alive and floating until rescuers can find them.
For dinner, everyone on board came to a cookout on the deck near the bow of the ship! Delicious burgers, hotdogs, chicken, sausages and brisket were grilled up and enjoyed. What a great setting for some terrific food!
In my first blog entry the Question of the Day was:
Think about what you know about President Thomas Jefferson…What does he have to do with the Atlantic Ocean?
Here is some interesting information about Thomas Jefferson and the ocean:
As most people know, Thomas Jefferson was a writer, an artist, an architect, a statesmen and a lawyer. He was also one of our most scientific presidents. In 1807, President Jefferson established the Survey of the Coast to produce the nautical charts necessary for maritime safety, defense, and the establishment of national boundaries. The United States Coast and Geodetic Survey is the oldest scientific organization in the U.S. Other agencies that became part of NOAA in 1970 include the Weather Bureau, formed in 1870, and the Bureau of Commercial Fisheries, formed in 1871. Much of America’s scientific heritage resides in these agencies. They brought their cultures of scientific accuracy and precision, stewardship of resources, and protection of life and property to NOAA.
The first Picture of the Day shows a side sonar “fish”. Here is some information about side scan sonars.
NOAA Teacher at Sea Emily Whalen Aboard NOAA Ship Henry B. Bigelow April 27 – May 10, 2015
Mission: Spring Bottom Trawl Survey, Leg IV
Geographical Area of Cruise: Gulf of Maine Date: May 1, 2015
Weather Data from the Bridge: Winds: Light and variable
Air Temperature: 6.2○ C
Water Temperature: 5.8○ C
Science and Technology Log:
Earlier today I had planned to write about all of the safety features on board the Bigelowand explain how safe they make me feel while I am on board. However, that was before our first sampling station turned out to be a monster haul! For most stations I have done so far, it takes about an hour from the time that the net comes back on board to the time that we are cleaning up the wetlab. At station 381, it took us one minute shy of three hours! So explaining the EEBD and the EPIRB will have to wait so that I can describe the awesome sampling we did at station 381, Cashes Ledge.
Before I get to describing the actual catch, I want to give you an idea of all of the work that has to be done in the acoustics lab and on the bridge long before the net even gets into the water.
The bridge is the highest enclosed deck on the boat, and it is where the officers work to navigate the ship. To this end, it is full of nautical charts, screens that give information about the ship’s location and speed, the engine, generators, other ships, radios for communication, weather data and other technical equipment. After arriving at the latitude and longitude of each sampling station, the officer’s attention turns to the screen that displays information from the Olex Realtime Bathymetry Program, which collects data using a ME70 multibeam sonar device attached to bottom of the hull of the ship .
Traditionally, one of the biggest challenges in trawling has been getting the net caught on the bottom of the ocean. This is often called getting ‘hung’ and it can happen when the net snags on a big rock, sunken debris, or anything else resting on the sea floor. The consequences can range from losing a few minutes time working the net free, to tearing or even losing the net. The Olex data is extremely useful because it can essentially paint a picture of the sea floor to ensure that the net doesn’t encounter any obstacles. Upon arrival at a site, the boat will cruise looking for a clear path that is about a mile long and 300 yards wide. Only after finding a suitable spot will the net go into the water.
The ME70 Multibeam uses sound waves to determine the depth of the ocean at specific points. It is similar to a simpler, single stream sonar in that it shoots a wave of sound down to the seafloor, waits for it to bounce back up to the ship and then calculates the distance the wave traveled based on the time and the speed of sound through the water, which depends on temperature. The advantage to using the multibeam is that it shoots out 200 beams of sound at once instead of just one. This means that with each ‘ping’, or burst of sound energy, we know the depth at many points under the ship instead of just one. Considering that the multibeam pings at a rate of 2 Hertz to 0.5 Herts, which is once every 0.5 seconds to 2 seconds, that’s a lot of information about the sea floor contour!
The stations that we sample are randomly selected by a computer program that was written by one of the scientists in the Northeast Fisheries Science Center, who happens to be on board this trip. Just by chance, station number 381 was on Cashes Ledge, which is an underwater geographical feature that includes jagged cliffs and underwater mountains. The area has been fished very little because all of the bottom features present many hazards for trawl nets. In fact, it is currently a protected area, which means the commercial fishing isn’t allowed there. As a research vessel, we have permission to sample there because we are working to collect data that will provide useful information for stock assessments.
My watch came on duty at noon, at which time the Bigelowwas scouting out the bottom and looking for a spot to sample within 1 nautical mile of the latitude and longitude of station 381. Shortly before 1pm, the CTD dropped and then the net went in the water. By 1:30, the net was coming back on board the ship, and there was a buzz going around about how big the catch was predicted to be. As it turns out, the catch was huge! Once on board, the net empties into the checker, which is usually plenty big enough to hold everything. This time though, it was overflowing with big, beautiful cod, pollock and haddock. You can see that one of the deck crew is using a shovel to fill the orange baskets with fish so that they can be taken into the lab and sorted!
At this point, I was standing at the conveyor belt, grabbing slippery fish as quickly as I could and sorting them into baskets. Big haddock, little haddock, big cod, little cod, pollock, pollock, pollock. As fast as I could sort, the fish kept coming! Every basket in the lab was full and everyone was working at top speed to process fish so that we could empty the baskets and fill them up with more fish! One of the things that was interesting to notice was the variation within each species. When you see pictures of fish, or just a few fish at a time, they don’t look that different. But looking at so many all at once, I really saw how some have brighter colors, or fatter bodies or bigger spots. But only for a moment, because the fish just kept coming and coming and coming!
Finally, the fish were sorted and I headed to my station, where TK, the cutter that I have been working with, had already started processing some of the huge pollock that we had caught. I helped him maneuver them up onto the lengthing board so that he could measure them and take samples, and we fell into a fish-measuring groove that lasted for two hours. Grab a fish, take the length, print a label and put it on an envelope, slip the otolith into the envelope, examine the stomach contents, repeat.
Some of you have asked about the fish that we have seen and so here is a list of the species that we saw at just this one site:
Red deepsea crab
I think it’s human nature to try to draw conclusions about what we see and do. If all we knew about the state of our fish populations was based on the data from this one catch, then we might conclude that there are tons of healthy fish stocks in the sea. However, I know that this is just one small data point in a literal sea of data points and it cannot be considered independently of the others. Just because this is data that I was able to see, touch and smell doesn’t give it any more validity than other data that I can only see as a point on a map or numbers on a screen. Eventually, every measurement and sample will be compiled into reports, and it’s that big picture over a long period of time that will really allow give us a better understanding of the state of affairs in the ocean.
It seems like time is passing faster and faster on board the Bigelow. I have been getting up each morning and doing a Hero’s Journey workout up on the flying bridge. One of my shipmates let me borrow a book that is about all of the people who have died trying to climb Mount Washington. Today I did laundry, and to quote Olaf, putting on my warm and clean sweatshirt fresh out of the dryer was like a warm hug! I am getting to know the crew and learning how they all ended up here, working on a NOAA ship. It’s tough to believe but a week from today, I will be wrapping up and getting ready to go back to school!
NOAA Teacher at Sea Theresa Paulsen Preparing to Board NOAA Ship Okeanos Explorer March 16 – April 3, 2015
Mission: Caribbean Exploration (Mapping) Geographical Area of Cruise: Caribbean Trenchesand Seamounts Date: March 9, 2015
If you could have any super power imaginable, what would it be? Growing up, my son asked me this question numerous times as we walked our dog. While he pondered the advantages of flight, invisibility, or spontaneous combustion, my answer was always the same. I want Aquaman’s powers (but a better looking outfit). I want to swim underwater without the need for dive gear, seahorses, or gillyweed, to see what few others have seen. I want to communicate with whales and dolphins to find out what their large brains can teach us about our planet. While I may not be able to attain superhero status, I can join some real-world adventurers on an amazing vessel equipped to conduct research that will help realize my dream of seeing the unseen depths of the ocean.
Hello, from Northern Wisconsin! My name is Theresa Paulsen. I am a high school science teacher in Ashland, WI. I have been teaching for 17 years while living along the south shore of Lake Superior with my husband and our two children.
The pristine lake and the rich forests around the region provide the resources that sustain our local communities. As we work to promote local stewardship in the classroom, we must recognize that the health and welfare of the resources we treasure are connected to the greater global environment which is heavily influenced by the processes that occur in our oceans. The geological processes occurring near our research zone are fascinating. The North American plate slides passed the Caribbean plate creating the Puerto Rico trench, the deepest part of the Atlantic Ocean.
Maps generated by the vessel’s state-of-the-art multibeam sonar on our mission will help geologists learn more about the tectonic activity and potential seismic hazards in the area. (Let’s hope the only rumblings I feel are those caused by the typical mild sea-sickness!) The maps will also be used by marine biologists and resource managers to investigate and assess unique habitat zones. Learn more the mission goals here.
My students and I have been checking in on the vessels live video feed periodically as the ship sails from Rhode Island to Puerto Rico, mapping along the way. I will join the crew in Puerto Rico on the 14th to begin training before the vessel sets sail for the second leg of the mission on the 16th. Throughout our journey, scientists will use the maps we generate to determine areas that require further investigation with the vessel’s remotely operated vehicle (ROV) on the third leg of the mission.
My goal is to learn as much as I can on this expedition! There is no better way to motivate students to become life-long learners and scientific thinkers than to show them how exciting real research can be. Through the NOAA Teacher at Sea program, my students and I will have the rare opportunity to learn first-hand about the science and technology oceanographers use to study fascinating places in the ocean. I will return to the classroom in April, equipped with lesson ideas and answers to questions about ocean research and careers! Thank you for following me on my journey. Please post questions or comments. I will do my best to address them in future posts (although communication aboard the vessel can be tenuous, I am told). Here is my first question for you:
NOAA Teacher at Sea Lauren Wilmoth Aboard NOAA Ship Rainier October 4 – 17, 2014
Mission: Hydrographic Survey Geographical area of cruise: Kodiak Island, Alaska Date: Friday, October 16, 2014
Weather Data from the Bridge Air Temperature: 7.32 °C
Wind Speed: 9.2 knots
Latitude: 57°44.179′ N
Longitude: 152°27.987′ W
Science and Technology Log
Wednesday, I went on a launch to do bottom sampling and cross lines. Wednesday was our last day of data acquisition, so the motto on the POD (Plan of the Day) was “LEAVE NO HOLIDAYS! If in doubt, ping it again!” Bottom sampling is pretty straight forward. We drive to designated locations and drop a device that looks a little like a dog poop scooper down into the water after attaching it to a wench. The device has a mechanism that holds the mouth of it open until it is jarred from hitting the bottom. When it hits the bottom, it snaps closed and hopefully snatches up some of the sediment from the bottom. Then, we reel it up with the wench and see what’s inside.
We took 10 bottom samples and most were the same. We had a fine brown sand in most samples. Some samples contained bits of shell, so we documented when that was the case. At one location, we tried for samples three times and every time, we got just water. This happens sometimes if the sea floor is rocky and the device can’t pick up the rocks. If you try three times and get no definitive answer, you label the sample as unknown. Two times we got critters in our samples. One critter we found was an amphipod most likely. The second critter was shrimp/krill-like, but I don’t know for sure. Cross lines are just collecting sonar data in lines that run parallel to the previous data lines. This gives us a better image and checks the data.
Thursday, we closed out the tidal station at Terror Bay. This entailed doing staff observations, a tidal gauge leveling check, and then break down everything including completing a dive to remove the orifice. Since I have already taken part in a tidal gauge leveling check, I was assigned to the staff observations and dive party. As I mentioned in an earlier post, for staff observations you just record the level of the water by reading a staff every six minutes for three hours. We did this while on a boat, because the tide was pretty high when we got started, so we wouldn’t be able to read the staff if we were on shore. Again, the reason we do staff observations is so we can compare our results to what the tidal gauge is recording to make sure the tidal gauge is and has been working properly.
While doing staff observations, I saw a small jellyfish looking creature, but it was different. It had bilateral symmetry instead of radial symmetry. Bilateral symmetry is what we have, where one side is more or less the same as the other side. Jellyfish have radial symmetry which means instead of just one possible place you could cut to make two side that are the same, there are multiple places you can cut to make it the same on each side. Also, the critter was moving by flopping its body from side to side which is nothing like a jellyfish. I had to figure out what this was! In between our observations, Jeff, the coxswain, maneuvered the boat so I could scoop this guy into a cup. Once we finished our staff observations, we headed to the ship. I asked around and Adam (the FOO) identified my creature. It’s a hooded nudibranch (Melibe leonina). Nudibranches are sea slugs that come in a beautiful variety of colors and shapes.
After a quick return to the ship, we headed back out with a dive team to remove the orifice from underwater. Quick reminder: the orifice was basically a metal tube that air bubbles are pushed out of. The amount of pressure needed to push out the air bubbles is what tells us the depth of the water. Anyways, the water was crystal clear, so it was really neat, because we could see the divers removing the orifice and orifice tubing. Also, you could see all sorts of jellyfish and sea stars. At this point, I released the hooded nudibranch back where I got him from.
Just as we were wrapping up with everything. The master diver Katrina asked another diver Chris if he was alright, because he was just floating on his back in the water. He didn’t respond. It’s another drill! One person called it in on the radio, one of the divers hopped back in the water and checked his vitals, and another person grabbed the backboard. I helped clear the way to pull Chris on board using the backboard, strap him down with the straps, and pull out the oxygen mask. We got him back to the ship where the drill continued and the medical officer took over. It was exciting and fun to take part in this drill. This was a very unexpected drill for many people, and they acted so professional that I am sure if a real emergency occurred, they would be prepared.
Sadly, this was most likely my last adventure for this trip, because I fly out tomorrow afternoon. This trip has really been a one-of-a-kind experience. I have learned and have a great appreciation for what it takes to make a quality nautical chart. I am excited about bringing all that the Rainier and her crew have taught me back to the classroom to illustrate to students the importance of and the excitement involved in doing science and scientific research. Thank you so much to everyone on board Rainier for keeping me safe, helping me learn, keeping me well fed, and making my adventure awesome! Also, thank you to all those people in charge of the NOAA Teacher at Sea program who arranged my travel, published my blogs, provided me training, and allowed me to take part in this phenomenal program. Lastly, thank you to my students, family, and friends for reading my blog, participating in my polls, and asking great questions.
Did You Know?
1 knot is one nautical mile per hour which is equal to approximately 1.151 miles per hour.
Can you figure out what my unknown shrimp/krill critter is?
NOAA Teacher at Sea Lauren Wilmoth Aboard NOAA Ship Rainier October 4 – 17, 2014
Mission: Hydrographic Survey Geographical area of cruise: Kodiak Island, Alaska Date: Wednesday, October 15th, 2014
Weather Data from the Bridge Air Temperature: 4.4 °C
Wind Speed: 5 knots
Latitude: 57°56.9′ N
Longitude: 153°05.8′ W
Science and Technology Log
Thank you all for the comments you all have made. It helps me decide what direction to go in for my next post. One question asked, “How long does it take to map a certain area of sea floor?” That answer, as I responded, is that it depends on a number of factors including, but not limited to, how deep the water is and how flat the floor is in that area.
To make things easier, the crew uses an Excel spreadsheet with mathematical equations already built-in to determine the approximate amount of time it will take to complete an area. That answer is a bit abstract though. I wanted an answer that I could wrap my head around. The area that we are currently surveying is approximately 25 sq nautical miles, and it will take an estimated 10 days to complete the surveying of this area not including a couple of days for setting up tidal stations. To put this in perspective, Jefferson City, TN is approximately 4.077 sq nautical miles. So the area we are currently surveying is more than 6 times bigger than Jefferson City! We can do a little math to determine it would take about 2 days to survey an area the size of Jefferson City, TN assuming the features are similar to those of the area we are currently surveying.
Try to do the math yourself! Were you able to figure out how I got 2 or 3 days?
Since we’re talking numbers, Rainier surveyed an area one half the size of Puerto Rico in 2012 and 2013! We can also look at linear miles. Linear miles is the distance they traveled while surveying. It takes into account all of the lines the ship has completed. In 2012 and 2013, Rainier surveyed the same amount of linear nautical miles that it would take to go from Newport, Oregon to the South Pole Station and back!
Monday, I went on a launch to collect sonar data. This is my first time to collect sonar data since I started this journey. Before we could get started, we had to cast a CTD (Conductivity, Temperature and Depth) instrument. Sound travels a different velocities in water depending on the salinity, temperature, and pressure (depth), so this instrument is slowly cast down from the boat and measures all of these aspects on its way to the ocean floor. Sound travels faster when there is higher salinity, temperature, and pressure. These factors can vary greatly from place to place and season to season.
Imagine how it might be different in the summertime versus the winter. In the summertime, the snow will be melting from the mountains and glaciers causing a increase in the amount of freshwater. Freshwater is less dense than saltwater, so it mainly stays on top. Also, that glacial runoff is often much colder than the water lower in the water column. Knowing all of this, where do you think sound will travel faster in the summertime? In the top layer of water or a lower layer of water? Now you understand why it is so important to cast a CTD to make sure that our sonar data is accurate. To learn more about how sound travels in water, click here.
After casting our CTD, we spent the day running the sonar up and down and up and down the areas that needed to be surveyed. Again, this is a little like mowing the lawn. At one point, I was on bow watch. On bow watch, you sit at the front of the boat and look out for hazards. Since this area hasn’t been surveyed since before 1939, it is possible that there could be hazards that are not charted. Also, I worked down in the cabin of the boat with the data acquisition/sonar tuning. Some important things to do below deck including communicating the plan of attack with the coxswain (boat driver), activating the sonar, and adjusting the sonar for the correct depth. I helped adjust the range of the sonar which basically tells the sonar how long to listen. If you are in deeper water, you want the sonar to listen longer, because it takes more time for the ping to come back. I also adjusted the power which controls how loud the sound ping is. Again, if you are surveying a deeper area, you might want your ping to be a little louder.
Tuesday, I helped Survey Tech Christie Rieser and Physical Scientist Fernando Ortiz with night processing. When the launches come back after acquiring sonar data, someone has to make all that data make sense and apply it to the charts, so we can determine what needs to be completed the following day. Making sense of the data is what night processing is all about. First, we converted the raw data into a form that the program for charting (CARIS) can understand. The computer does the converting, but we have to tell it to do so. Then, we apply all of the correctors that I spoke about in a previous blog in the following order: POS/MV (Position and Orientation Systems for Marine Vessels) corrector, Tides corrector, and CTD (Conductivity, Temperature, and Depth) corrector. POS/MV corrects for the rocking of the boat. For the tides corrector, we use predicted tides for now, and once all the data is collected from our tidal stations, we will add that in as well. Finally, the CTD corrects for the change in sound velocity due to differences in the water as I discussed above.
After applying all of the correctors, we have the computer use an algorithm (basically a complicated formula) to determine, based on the data, where the sea floor is. Basically, when you are collecting sonar data there is always going to be some noise (random data that is meaningless) due to reflection, refraction, kelp, fish, and even the sound from the boat. The algorithm is usually able to recognize this noise and doesn’t include it when calculating the location of the seafloor. The last step is manually cleaning the data. This is where you hide the noise, so you can get a better view of the ocean floor. Also, when you are cleaning, you are double checking the algorithm in a way, because some things that are easy for a human to distinguish as noise may have thrown off the algorithm a bit, so you can manually correct for that. Cleaning the data took the longest amount of time. It took a couple of hours. While processing the data, we did notice a possible ship wreck, but the data we have isn’t detailed enough to say whether it’s a shipwreck or a rock. Senior Tech Jackson noted in the acquisition log that it was “A wreckish looking rock or a rockish looking wreck.” We are going to have the launches go over that area several more times today to get a more clear picture of is going on at that spot.
Monday was the most spectacular day for wildlife viewing! First, I saw a bald eagle. Then, I saw more sea otters. The most amazing experience of my trip so far happened next. Orcas were swimming all around us. They breached (came up for air) less than 6 feet from the boat. They were so beautiful! I got some good pictures, too! As if that wasn’t good enough, we also saw another type of whale from far away. I could see the blow (spray) from the whale and a dorsal fin, but I am not sure if it is was a Humpback Whale or a Fin Whale. Too cool!
Did You Know?
Killer whales are technically dolphins, because they are more closely related to other dolphins than they are to whales.
NOAA Teacher at Sea Lauren Wilmoth Aboard NOAA Ship Rainier October 4 – 17, 2014
Mission: Hydrographic Survey Geographical area of cruise: Kodiak Island, Alaska Date: Sunday, October 12, 2014
Weather Data from the Bridge Air Temperature: 1.92 °C
Wind Speed: 13 knots
Latitude: 58°00.411′ N
Longitude: 153°10.035′ W
Science and Technology Log
In a previous post, I discussed how the multibeam sonar data has to be corrected for tides, but where does the tide data come from? Yesterday, I learned first hand where this data comes from. Rainier‘s crew sets up temporary tidal stations that monitor the tides continuously for at least 30 days. If we were working somewhere where there were permanent tidal station, we could just use the data from the permanent stations. For example, the Atlantic coast has many more permanent tidal stations than the places in Alaska where Rainier works. Since we are in a more remote area, these gauges must be installed before sonar data is collected in an area.
We are returning to an area where the majority of the hydrographic data was collected several weeks ago, so I didn’t get to see a full tidal station install, but I did go with the shore party to determine whether or not the tidal station was still in working condition.
A tidal station consists of several parts: 1) an underwater orifice 2) tube running nitrogen gas to the orifice 3) a nitrogen tank 4) a tidal gauge (pressure sensor and computer to record data) 5) solar panel 6) a satellite antennae.
Let me explain how these things work. Nitrogen is bubbled into the orifice through the tubing. The pressure gauge that is located on land in a weatherproof box with a laptop computer is recording how much pressure is required to push those bubbles out of the orifice. Basically, if the water is deep (high tide) there will be greater water pressure, so it will require more pressure to push bubbles out of the orifice. Using this pressure measurement, we can determine the level of the tide. Additionally, the solar panel powers the whole setup, and the satellite antennae transmits the data to the ship. For more information on the particulars of tidal stations click here
The tidal station in Terror Bay did need some repairs. The orifice was still in place which is very good news, because reinstalling the orifice would have required divers. However, the tidal gauge needed to be replaced. Some of the equipment was submerged at one point and a bear pooped on the solar panel. No joke!
After the tidal gauge was installed, we had to confirm that the orifice hadn’t shifted. To do this, we take manual readings of the tide using a staff that the crew set-up during installation of the tidal station. To take manual (staff) observations, you just measure and record the water level every 6 minutes. If the manual (staff) observations match the readings we are getting from the tidal gauge, then the orifice is likely in the correct spot.
Just to be sure that the staff didn’t shift, we also use a level to compare the location of the staff to the location of 5 known tidal benchmarks that were set when the station was being set up as well. As you can see, accounting for the tides is a complex process with multiple checks and double checks in place. These checks may seem a bit much, but a lot of shifting and movement can occur in these areas. Plus, these checks are the best way to ensure our data is accurate.
Today, I went to shore again to a different area called Driver Bay. This time we were taking down the equipment from a tidal gauge, because Rainier is quickly approaching the end of her 2014 season. Driver Bay is a beautiful location, but the weather wasn’t quite as pretty as the location. It snowed on our way in! Junior Officer Micki Ream who has been doing this for a few years said this was the first time she’d experienced snow while going on a tidal launch. Because of the wave action, this is a very dynamic area which means it changes a lot.
In fact, the staff that had been originally used to manually measure tides was completely gone, so we just needed to take down the tidal gauges, satellite antenna, solar panels, and orifice tubing. The orifice itself was to be removed later by a dive team, because it is under water. After completing the tidal gauge breakdown, we hopped back on the boat for a very bumpy ride back to Rainier. I got a little water in my boots when I was hopping back aboard the smaller boat, but it wasn’t as cold as I had expected. Fortunately, the boat has washers and driers. It looks like tonight will be laundry night.
The food here is great! Last night we had spaghetti and meatballs, and they were phenomenal. Every morning I get eggs cooked to order. On top of that, there is dessert for every lunch and dinner! Don’t judge me if I come back 10 lbs. heavier. Another cool perk is that we get to see movies that are still in the theaters! They order two movies a night that we can choose from. Lastly, I haven’t gotten seasick. Our transit from Seward to Kodiak was wavy, but I don’t think it was as bad as we were expecting. The motion sickness medicines did the trick, because I didn’t feel sick at all.
Did You Know?
NOAA (National Oceanic and Atmospheric Administration) contains several different branches including the National Weather Service which is responsible for forecasting weather and issuing weather alerts.
NOAA Teacher at Sea Lauren Wilmoth Aboard NOAA Ship Rainier October 4 – 17, 2014
Mission: Hydrographic Survey Geographical area of cruise: Kodiak Island, Alaska Date: Wednesday, October 8, 2014
Weather Data from the Bridge Air Temperature: 3.82 °C
Wind Speed: 6.1 knots
Latitude: 60°07.098′ N
Longitude: 149°25.711′ W
Science and Technology Log
The launch that I participated in on Tuesday was awesome! We went to an area called Thumb’s Cove. I thought the divers must be crazy, because of how cold it was. When they returned to the boat from their dive, they said the water was much warmer than the air. The water temperature was around 10.5°C or 51°F while the air temperature was hovering right above freezing. One diver, Katrina, took an underwater camera with her. They saw jellyfish, sea urchins, and sea stars.
The ride to and from the cove was quite bouncy, but I enjoyed being part of this mini-adventure! Later that day, we did what is called DC (Damage Control) familiarization. Basically, we practiced what do in case of an emergency. We were given a pipe with holes in it and told to patch it with various objects like wooden wedges. We also practiced using a pump to pump water off of the ship if she were taking on water. Safety drills are also routine around here. It’s nice to know that everyone expects the best, but prepares for the worse. I feel very safe aboard Rainier.
Today, I got a chance to meet with the CO (Commanding Officer), and he explained the navigational charts to me. Before the ship leaves the port, there must be a navigation plan which shows not only the path the ship will take, but also the estimated time of arrival to various points along the way. This plan is located on the computer, but also, it must be drawn on a paper chart for backup.
This illustrates again how redundancy, as I discussed in my last blog post, is a very important part of safety on a ship. Every ship must have up-to-date paper charts on board. These charts get updated with the information collected from the hydrographic surveys. The ocean covers more than 70% of our planet which is why Rainier‘s mission of mapping the ocean is so important. There are many areas in Alaska where the only data on the depth of the water was collected before sonar technology was used. In fact, some places the data on the charts comes from Captain Cook in the 1700s! If you look at the chart below the water depth is measured in fathoms. A fathom is 6 feet deep. Places that are less than 1 fathom deep have a 05 where the subscript indicates how deep the water is in feet.
Today, I also spoke with the AFOO (Acting Field Operations Officer), Adam, about some work that he had been doing on Rainier‘s sister ship NOAA Fairweather. One project they are working on is connecting hydrographic data to fish distribution and abundance mapping. Basically, they want to find out if it is possible to use sonar data to predict what types of fish and how many you will find in a particular location
They believe this will work, because the sonar produces a back scatter signature that can give you an idea of the sea floor composition (i.e. what it is made of). For instance, they could tell you if the sea floor is rocky, silty, or sandy using just sonar, as opposed to, manually taking a bottom sample. If this hydrographic data is integrated with the data collected by other NOAA ships that use trawl nets to survey the fish in an area, this would allow NOAA to manage fisheries more efficiently. For example, if you have map that tells you that an area is likely to have fish fry (young fish) of a vulnerable species, then NOAA might consider making this a protected area.
On Tuesday, I had a little extra time in the afternoon, so I decided to ride my bike down to the Alaska SeaLife Center which is a must-see if you ever find yourself in Seward. There were Harbor Seals (Phoca vitulina), Stellar Sea Lions (Eumetopias jubatus), Puffins (Genus Fratercula), Pacific Salmon (Genus Oncorhynchus) and much more. I really appreciated that the SeaLife Center focused on both conservation and on organisms that live in this area. A local high school even had their art students make an exhibit out of trash found on the beach to highlight the major environmental issue of trash that finds its way to the ocean.
Can you think a project we could do that would highlight a main environmental concern in Eastern Tennessee? I also thought is was really interesting to see the Puffins dive into the water. The SeaLife Center exhibit explained about how Puffin bones are more dense than non-sea birds. These higher density bones are an adaptation that helps them dive deeper.
I officially moved into the ship today. Prior to that, I was staying at a hotel while they were finishing up repairs. We are expected to get underway on Friday afternoon. I am staying in the princess suite! It is nice and cozy. I have all of the essentials. I have a desk, bunk beds, 2 closets, and one bathroom (head).
Did You Know?
Junior Officers get homework assignments just like you. At the navigation briefing today, the CO (Commanding Officer) told the Junior Officers what that they needed to review several documents before going through the inside passage (a particularly tricky area to navigate). He is expecting them to lead different parts of the next navigation briefing, but he isn’t going to tell them which part they are leading until right before. Therefore, it is important that they know it all! It’s a little like a pop quiz and presentation in one.
Word of the Day
Bathymetry – the study of the “beds” or “floors” of bodies of water.
NOAA Teacher at Sea Lauren Wilmoth Aboard NOAA Ship Rainier October 4 – 17, 2014
Mission: Hydrographic Survey Geographical area of cruise: Kodiak Island, Alaska Date: Tuesday, October 7, 2014
Weather Data from the Bridge Air Temperature: 0.77 °C
Wind Speed: 12 knots
Latitude: 60°07.098′ N
Longitude: 149°25.711′ W
Science and Technology Log
Our departure from Seward was originally scheduled for today, but the ship is having some repairs done, so our expected departure is now Wednesday or Thursday. In case you were wondering, this doesn’t delay my return date. Regardless of the fact that we are not underway, there is still so much to learn and do.
Yesterday, I met with Christie, one of the survey techs, and learned all about the Rainier’s mission. The main mission of the ship is to update nautical charts. Up-to-date charts are crucial for safe navigation. The amount of data collected by Rainier if vast, so although the main mission of the Rainier is updating nautical charts, the data are also sent to other organizations who use the data for a wide variety of purposes. The data have been used for marine life habitat mapping, sediment distribution, and sea level rise/climate change modeling among other things. In addition to all of that, Rainier and her crew sometimes find shipwrecks. In fact, Rainier and her crew have found 5 shipwrecks this season!
Simplified, hydrographic research involves sending multiple sonar (sound) beams to the ocean floor and recording how long it takes for the sound to come back. You can use a simple formula of distance=velocity/time and divide that by two because the sound has to go to the floor and back to get an idea how deep the ocean is at a particular spot. This technique would be fine by itself if the water level weren’t constantly fluctuating due to tides, high or low pressure weather systems, as well as, the tilt of the ship on the waves. Also, the sound travels at different speeds according to the water’s temperature, conductivity and depth. Because of this, the data must be corrected for all of these factors. Only with data from all of these aspects can we start to map the ocean floor. I have attached some pictures of what data would look like before and after correction for tides.
I was also given a tour of the engine room yesterday. Thanks, William. He explained to me how the ship was like its own city. In this city, there is a gym, the mess (where you eat), waste water treatment, a potable (drinkable) water production machine, and two engines that are the same type of engines as train engines. Many of my students were interested in what happens to our waste when we are aboard the ship. Does it just get dumped into the ocean? The answer is no. Thank goodness! The waste water is exposed to bacteria that break down the waste Then, salt water is used to produce chlorine that further sterilizes the waste. After those two steps, the waste water can be dumped. The drinking water is created by evaporating the water (but not the salt) from salt water. The heat for this process is heat produced by the engine. William also explained that there are two of everything, so if something fails, we’ll still be alright.
Sunday, I drove from Anchorage to Seward. The drive was so beautiful! At first, I was surrounded by huge mountains that were vibrant yellow from the trees whose leaves were turning. Then, there was snow! It was actually perfect, because the temperature was at just the right point where the snow was melted on the road, but it had blanketed the trees. Alaska is as beautiful as all of the pictures you see. The drive should have been about 2.5 hours, but it took me 3.5 hours, because behind each turn the view was better than the previous turn, so I had to stop and take pictures. I took over 100 pictures on that drive. Once I arrived in Seward, I was given my first tour of the ship and then I had some time to explore Seward.
Yesterday (the first official day on the job), I learned so much. Getting used to the terminology is the hardest part. There are acronyms from everything! Immersion is the best way to learn a foreign language, and I have been immersed in the NOAA (National Oceanic and Atmospheric Administration) language. There is the CO (Commanding Officer), XO (Executive Officer), FOO (Field Operations Officer), TAS (Teacher at Sea or Me!), POD (Plan of the Day) and that is just the tip of the iceberg. I also had to learn all of the safety procedures. This involved me getting into my bright red survival suit and learning how to release a lifeboat.
Today, I am going on a dive launch. The purpose of this launch is to help some of the divers get more experience in the cold Alaskan waters. I will get to ride on one of the smaller boats and watch as the Junior Officers scuba dive.
Did You Know?
NOAA Corps is one of the 7 branches of the U.S. uniformed services along with the Army, Navy, Coast Guard, Marine Corps, Air Force, and the Public Health Service Commissioned Corps (PHSCC).
NOAA Teacher at Sea Lauren Wilmoth Aboard NOAA Ship Rainier October 4 – 17, 2014
Mission: Hydrographic Survey Geographical area of cruise: Kodiak Island Date: October 2, 2014
My name is Lauren Wilmoth, and I have been teaching biology at Jefferson County High School in Dandridge, TN for 3 years. Prior to teaching in Jefferson County, I conducted research on pipevine swallowtail (Battus philenor) caterpillars in East Tennessee as a part of my master’s thesis at the University of Tennessee Knoxville. My research involved a lot of hiking in the woods and catching butterflies with my net. Who wouldn’t enjoy that? I learned a lot about how science works while obtaining my master’s degree, and now, as a teacher, I get to share my fascination with nature and my expertise with my students!
I grew up in Alabama, and like many families in Alabama, mine spent many spring breaks at the beach. We camped every year at state parks on the Florida panhandle. It was on these trips that I began to appreciate the ocean as a fun and interesting place. We enjoyed the dune trails and the peculiar dune ecosystems. We even went deep sea fishing one time, and I didn’t get seasick! (Hopefully, I will be able to say the same after this trip). I distinctly remember one time when a Portuguese Man-of-War jellyfish (Physalia physalis) washed ashore. It was the highlight of my trip to see this strange creature I had never even heard of! Although I grew up enjoying the ocean and it’s bounty (crab and shrimp are my favorites), I didn’t start to understand its importance until I became a biology major in college (oddly enough in the landlocked state of Arkansas). No matter where you live, you are connected to the ocean through its role in our climate, our water cycle, and as the main source of oxygen on our planet among other things. The ocean intrigues me with its mystery, and that is the reason I applied to be a part of this NOAA (National Oceanic and Atmospheric Administration) Teacher at Sea Program. I am thrilled about this once in a lifetime opportunity to help with hydrographic research off of the coast of Alaska this fall. In fact, I learned the news of which cruise I would be on while at Dublin Airport after an amazing vacation with my husband in Ireland. I checked my e-mail and let out an audible shrill of excitement.
I have never been to Alaska, and I know very little about hydrographic research. This cruise excites me, because I will have the opportunity to learn something complete new, and after the cruise, I will be able to share what I learned with my students and colleagues! In case you were wondering, hydrographic research involves mapping the ocean floor which is particularly important for safe navigation in these waters. Also, hydrographic research can involve determining the composition of the seafloor. If you want to learn more about hydrographic surveys, click on the link. Of course, you can also learn more about our hydrographic survey by continuing to read my blog during my trip. To complete this hydrographic research, I will be working with the NOAA team aboard the NOAA Ship Rainier. It contains a lot of fancy equipment used to complete these surveys that I hope to gain a better understanding of on this trip. This is a large ship. It is 231 feet long and is equipped with a dining area and 8 smaller boats! To give you some perspective on its size, it would reach from the end goal line on a football field to the 23rd yard line on the opposite side of the field! To learn more about NOAA ship Rainierclick the link. Stay tuned to my blog to hear firsthand what life aboard NOAA Ship Rainieris like.
NOAA Teacher at Sea Joanie Le Aboard NOAA Ship Henry B. Bigelow August 5 – 16, 2014
Mission: Deep-Sea Coral Research Geographic area of the cruise: 40 miles SE of Cape May, New Jersey Date: August 5, 2014
Weather information from the Bridge:
Air Temperature: 25.5° Celsius
Wind Speed: 10 knots
Wind Direction: 330°
Weather Conditions: clear
Latitude: 37° 37.7′ N
Longitude: 74° 06.8′ W
Science and Technology Log
After almost a full day at sea, we are only hours away from the first watch and the first glimpse of data. Preparations commence, and anticipation is high.
For the next two weeks, we’ll study the deep-sea corals that occur in submarine canyons off the east coast. They have been found in every region of the United States, but for this mission we’ll target canyons in the Northeast region, investigating canyons east of New Jersey, Delaware, Maryland, and Virginia.
Deep-Sea Corals are similar to the familiar shallow-water corals, but cannot harness sunlight for energy through photosynthesis. Instead, they rely on nutrients from the water including detritus (non-living organic matter) and plankton. It is believed that Deep-Sea Corals find both shelter and bountiful grub on the steep-sided canyon walls where the faster-moving currents bring in the day’s meal. Surprisingly, many are just as beautiful and colorful as their shallow-water counterparts, like this bamboo coral photographed at Mytilus Seamount during the NOAA OER US Northern Canyons mission last year.
Though not the hot snorkeling destination, the Deep-Sea Corals in this region are important habitat providers as well as sensitive indicators of ecosystem health. They are long-living but slow-growing and do not recover quickly. Both bottom trawling and possible energy harnessing (off-shore wind farms and oil and gas acquisition) are possible threats to their survival.
Because bottom trawling is so detrimental to the coral communities, we’ll use TowCam to survey the area. Deploying the TowCam is a delicate process, with sensitive and pricey equipment on the line. After a few test deployments yesterday, the team began picking our dive locations. There is plenty to consider when finding a dive spot, including the topography of the sea floor and slope of the canyon walls. We also use the results generated by a habitat suitability model that predicts where deep-sea corals are likely to occur. Scientists must strike a balance between the steeper, high-probability cliffs and the gentler slopes.
Life aboard a ship is surely not easy. The constant rocking and clanging of cold metal will take a while to get used to, and I will sadly miss many daytime hours with our 12 hours on-12 hours off watch schedule. And while waking at 3 AM to greet a deathly dark ocean view may not seem like summertime fun to most, this first morning underway has convinced me that a couple weeks at sea is a treat I won’t soon forget.
Storms and subsequent rainbows with dolphins cavorting in the Okeanos Explorer’s bow wake get you asking the big questions.
Why are we here?
Not in the larger philosophical, sense but why is the Okeanos Explorer at 29⁰N, 79⁰W? With 95% of the ocean unexplored, why did NOAA choose the Blake Plateau (Stetson Mesa) to map? I went to Derek Sowers, the Expedition Coordinator for this cruise, to find out.
Derek is a Physical Scientist with NOAA’s Office of Ocean Exploration and Research (OER), which is the program that leads the scientific missions on the Okeanos Explorer. In preparation for the ship’s explorations this year, OER staff asked many scientists and ocean managers in the Gulf of Mexico and along the U.S. Atlantic southeastern seacoast for priority areas for ocean exploration.The main purpose for the Okeanos Explorer is to explore largely unknown parts of the ocean and then put the data and discoveries out there for other scientists to use as a foundation for further research and improved stewardship. OER staff boil all these ideas down to a few and talk about the pros and cons of the final exploration focus areas. Once an operation’s area is determined for a cruise, OER then asks scientists what additional science can be done in these areas while the ship is planning to go there.
Much of this “extra” science benefits other parts of NOAA – such as the scientists that study fisheries and marine habitat. To manage this extra scientific work, the ship often hosts visiting scientists. On the current cruise, Chris Taylor from NOAA Fisheries Oceanography Branch joined the cruise to lead the plankton tow and oceanographic measurement work to search for Bluefin Tuna larvae in this part of the ocean and to understand the ocean chemistry here. It is important to NOAA to multi task and utilize the ship 24/7 to accomplish numerous scientific objectives. During March and April, lots of details were nailed down and by the middle of April Derek knew that the expedition could include time to do the plankton tows and extra water sampling.
Now, just like a family vacation, things happen along the way that require everyone to make changes. A road could be closed, someone could get sick, the car could break down. These expeditions are no different. So, how do decisions happen at sea?
The crew of the Okeanos Explorer are responsible for safe operation of the ship and for supporting the visiting scientists in accomplishing their objectives for the cruise. The visiting scientists, as led by the Expedition Coordinator, must make decisions about how, where, and what needs to get done to accomplish the science objectives of the cruise. The Expedition Coordinator discusses these plans with the ship’s Operations Officer and she consults with the head of the various department on the ship (Deck, Engineering, Medical, etc.) and the Commanding Officer to most effectively support safely achieving the science team’s goals. There is a daily Operations Meeting for all of these leaders to meet and ensure coordination throughout the day so that things run smoothly on the ship. The Commanding Officer is responsible for making sure the crew implements their duties, while the Expedition Coordinator (often called the Chief Scientist) is responsible for making sure the scientists implement their duties.
For complex decisions, like our present decision whether or not to go inshore to get a replacement plankton net, lots of factors are weighed and the final call is with the Expedition Coordinator and the CO. The Expedition Coordinator weighs trading off seafloor mapping time with getting more plankton data and decides if it is worth it to go get the net. Commander Ramos must decide if it is safe and reasonable to do so and makes the final decision of where and what the ship does.
For seafloor mapping work that happens 24 hours a day, there are three teams of two people who “stand watch” on 8 hour work shifts (called a “watch”). Each watch has a watch leader that works at the direction of the Expedition Coordinator. The Watch Leader ensures the quality of the mapping work accomplished during their 8 hour watch. The ship’s Survey Technician, Jacklyn James, works closely with the visiting mapping scientists to run all of the complex computer systems under standard operating procedures.
Here is an example of how routine small decisions are made. Let’s say that Vanessa Self-Miller (see personal log) is on duty as the Watch Leader and wants to have the ship move over 500 meters to get better sonar coverage of the seafloor below.
Vanessa uses the intercom to call the deck officer on the bridge and tells the officer she would like the ship to move over 500 meters. The officer checks the AIS (see last blog) and sea conditions to see if this would be a safe maneuver for the ship. The reasons for not approving the mapping team’s request would almost always be safety based. Most of the time, the officer says “Sure Thing. Roger That.” and in the space of a few minutes the ship has changed course as requested.
The answer to “why are we here?” is a complex, time-consuming endeavor, but when it works, like on this expedition, it is magic to watch unfold.
Personal log –
Wish you were here.
The storm was not one of those Illinois summer thunderstorms that come racing in from Iowa – gathering energy like a 5th grade class the last few weeks of school. Nope. No simultaneous lightning thunder howitzers that you feel in your spine; just some lightning and wind gusts to 50 knots, but I sure wanted to see how things looked from the bridge once I heard the foghorn. The bridge on the Okeanos Explorer is one of my favorite places on this ship. I always ask permission for entry and if the circumstances allow, the officer on duty will grant it.
Operations Officer Lt.Rose’s IPod was playing Pink Floyd while she divided her attention between the myriad of dials and screens and talking navigation with mapping intern Kalina Grabb. AB Tepper-Rasmussen and NOAA Corps Officer LTJG (Lieutenant Junior Grade) Bryan Begun peered into the foggy soup and monitored the AIS.
The irony of the moment struck me because while the crew unconsciously played percussion on the brass rail overhead or mumbled lyrics and David Gilmour and Roger Waters sang about not needing an education, there was so much education and proof of education going on in this little room. That is the defining image I’ll always have of this space on the Okeanos Explorer. It is a place where the acquisition and exhibition of knowledge are so evident and invigorating. You can’t spend more than 4 minutes in this space without learning something or being amazed at how smart these people are and how devoted they are to use that knowledge to carry out the science of this mission. On this particular night, the skies lifted and we had hopes of seeing a launch at Canaveral, 40 miles to the west. Lt. Rose announced to the whole ship that a double rainbow could be seen portside and even the dolphins responded to her call to educate the right side of our brains.
What else have I been doing?
In addition to spending time on the bridge- I have been helping with the XBT launches, using the photometer to add data to the NOAA’s Aerosol Project – with the ever faithful Muffin from good ol’ Hampshire Elementary and preparing for a night launch of CTD and plankton tows – more on that nextblog.
DID YOU KNOW?
Like all women, Vanessa Self-Miller’s mom was great at multi-tasking. While she got things rolling for the evening in the household, Vanessa was her mom’s guinea pig for the next day’s science lessons for her 6th grade students at Jackson Middle School in Jackson, Louisiana. She also instilled a love of the scientific method in her daughter.
Her father was a math guy and found out early that Vanessa was going to be the 3rd wheel with her brother on typical father son activities that involved mechanics or being out in nature. That nurturing and her work ethic prompted Vanessa to get a degree in physics at Southern University in Baton Rouge, Louisiana. She went on to work for the U.S. Navy as a hydrographer doing a lot of mapping harbors and near the shore. She received her masters degree in Hyrdrographic Science from University of Southern Mississippi.
Now she is thrilled to be a physical scientist/hyrdrographer for NOAA. While it is a challenge to coordinate job related travel with her husband and two children, she loves working for NOAA. NOAA respects a work-life balance and that allows her to pursue her passions in life. She wants to encourage all students but especially the young girls to start early in their path to a career in science. She feels that how parents nurture their girls is important in their seeking employment in the fields of science.
On a personal note, any time a question came up from this naive teacher or any of the mapping interns, Vanessa was able to answer it completely and without pause. She encourages all the 5th graders out there, male or female, to pursue their scientific oceanographic dreams. NOAA will need today’s fifth graders to investigate sea level rise and all the Ocean Engineering energy products that our country will need twenty years from now. There will always be a need for scientists who love to explore and want to work for NOAA.
NOAA Teacher at Sea Dave Murk Aboard NOAA Ship Okeanos Explorer May 7 – 22, 2014
Mission: EX 14-03 – Exploration, East Coast Mapping Geographical Area of Cruise: Off the Coast of Florida and Georgia – Western portion of the Blake Plateau (Stetson Mesa) Date: May 10, 2014
Weather data from Bridge:
Temperature 25 degrees celsius (can you convert to Fahrenheit?)
WInd – From 160 degrees at 14 knots (remember north is 0 degrees)
Latitude : 28 degrees – Longitude: 79 degrees.
Science and Technolgy Log:
Two of the goals for this expedition. (There are a lot more)
Expedition coordinator Derek Sowers said his best case scenario for this mission is to meet all the cruise objectives. The main one- an aggressive 24/7 campaign to map as much seafloor as possible within top priority mapping areas offshore of the Southeast United States and along the canyons at the edge of the Atlantic continental shelf.
In addition to that mapping goal, he wants the visiting fisheries scientist on board to get good water samples for the Ocean Acidification Program and good samples from the plankton tows. Last but not least, he “wants the mission team to have a great learning experience.”
The ship has three different sonars, each of which is good for different things. One sonar sends out a single beam of sound that lets you see fish and other creatures in the water column. Another sonar sends powerful sounds that bounce back off the bottom and gives you information about the geology (rocks and sediment) of the seafloor. Perhaps the most impressive sonar onboard is the multi-beam sonar. You know how your garden hose has a setting for jet spray when you want to aim it at your brother who is 10 feet away? The water comes out in a straight narrow line. But there’s also another setting called ‘shower” or wide spray. The multibeam sonar is like combining the best of both of these sprays into one and sends out a fan of sound that allows the scientists to map a broad section of the seafloor. By measuring how long it takes this sound to reach a patch of seafloor and return to the ship, it is possible to estimate the distance and that is how the shape of the seafloor can be mapped. Using this technology enables NOAA to map the seascape in order to better protect marine habitat and reduce harm from human activities. Mapping the marine protected areas off the east coast of Florida and Georgia is important because there are deep sea corals in this area and it is important fisheries habitat.
This cruise features a visiting scientist from NOAA Fisheries, named Chris Taylor. Chris’s part of the expedition includes collecting water samples and towing a net that can collect very small creatures called plankton. Chris is specifically examining the plankton he catches to see if bluefin tuna use this part of the ocean to lay eggs and raise young tuna. Samples from the net will go back to a lab to be analyzed to make sure they are bluefin and not yellowfin tuna.
Chris spent most of this windy but warm night tying a rope to the net that he’ll use for HOPEFULLY – catching some baby Bluefin Tunas. Like insects, Bluefin tuna go through an egg stage THEN a larva stage. When they are very small they drift with the currents with the rest of the ocean community. Once a larva is over 7 millimeters, they can avoid the net. But If we find some Bluefin tuna – it may mean that we have found a new spawning ground for Bluefin tuna in the southern North Atlantic.
Two people who make this ship run so well:The operations officer – Lieutenant Emily Rose. Officer Rose can usually be found on the bridge of the NOAA ship Okeanos Explorer. Today she was teaching a course on small craft navigation before I caught up with her. The thing she really loves about this position is that there are new set of challenges each day. She is always learning (and I’ll add that she is almost always sharing that knowledge with others) but the ship is her first responsibility. The most difficult thing is getting up every morning before 3:00 a.m. and being away from everyone back home.
Chief Electronics Technician Richard Conway and Electronics Technician Will Okeson are the Tech guys and they are always busy. Since Okeanos Explorer is America’s premier ocean exploration ship, there are a lot of computers, miles of cable and lots of video equipment to maintain. Richard and Will’s favorite part of the job is when all the parts work together and the public can see their product and when they can trouble shoot and help the science team reach their objectives. The most difficult thing it so be away from families when there is a crisis or joyous moment.
Two things about my personal experiences so far on EX-14-03 (our mission)
First – – “SCIENCE RULES” to quote Bill Nye. Every Okeanos Explorer crew member and scientific crew member are all about the science of the mission. When one of the science crew is going to launch something called an XBT over the side, they call and get an OK from the bridge (where the captain or second in command and the crew that are on “watch” are located). No one hesitates to ask questions of each other. Why is this? What is that? Where is the nearest ship? What’s for lunch? (just kidding ! Chief Steward Randy posts a menu every day and it beats out Golden Corral any day of the week for tastiness and diversity). But the important thing of the mission is the science and every single person on the ship works to make the mission a success.
Second – RESPECT – There is so much respect shown on the Okeanos Explorer. It’s respect for other people, for the ship, for the environment, for rules and for commons spaces. Yesterday while on the bridge, Ensign Nick Pawlenko was taking over from Commander Ramos and they both showed such respect for rules and for each other by going over all the observations of the ship’s speed, the weather conditions and whether there were any other ships in the area. When breakfast was over – I saw Operations Officer Rose stick her head in the galley (kitchen) and thank Chief Cook Ray and Chief Steward Randy for a great meal. No one slams doors since it might wake the crew and scientists who are on night duty. Everyone cleans up after themselves. If you ever have a question and if the crew or scientists can answer it, they will. There is respect for the environment when we separate our garbage each meal. If only the whole world was like the Okeanos.
MYSTERY PICTURE – Here are two photos – what’s different about them? And WHY?? That’s the million dollar question (or an even better prize –bluefin tuna larva in our trawl nets )
Today’s blog is all about post processing, or “cleaning up” the data and being on night shift. It is a balmy, sliver moon night at port here, in Kodiak. We have come a long way in the last two weeks, during which survey crews have been working hard to finalize a Cold Bay report from last season before they devote themselves entirely to North Kodiak Island. I am in the plot room with Lieutenant Junior Grade Dan Smith who is on Bridge Duty from midnight until 4 a.m. with Anthony Wright, Able Seaman.
People work around the clock on Rainier whether it be bridge watch, processing data, or in the engine room. One thing that makes the night shift a little easier is that there is no shortage of daylight hours in Alaska: within two months, there will be less than an hour of complete darkness at night.
In previous blogs, I described how the team plans a survey, collects and processes data. In this blog, I will explain what we do with the data once it has been processed in the field. Tonight, Lieutenant Dan Smith is reviewing data collected in Sheet 5, of the Cold Bay region on the South Alaskan Peninsula. In September, 2013, the team surveyed this large, shallow and therefore difficult to survey area. The weather also made surveying difficult. Despite the challenges, the team finished collecting data for Sheet 5 and are now processing all the data they collected.
While I find editing to be one of the most challenging steps in the writing process, it is also the most rewarding. Through the editing process, particularly if you have a team, work becomes polished, reliable and usable. The Rainier crew reviews their work for accuracy as a team and while Sheet 5 belongs to Brandy Geiger, every crew member has played a part in making the Sheet 5 Final Report a reality, almost. On the left screen, Lieutenant Smith is looking at one line of data. Each color represents a boat, and each dot represents the data from one boat, and each dot represents a depth measurement computed by the sonar. The right screen shows which areas of the map he has already reviewed in green and the areas he still needs to review in magenta.
While the plot room is calm today in Kodiak, there have been times when work conditions are challenging, at best.
The crew continues on, despite the weather, so long as work conditions are safe.
Several days ago, Lieutenant Smith taught me the difference between a sonar ping that truly measured depth, and other dots that were not true representations of the ocean floor. Once you get an eye for it, you kill the noise quickly. In addition, when Lieutenant Smith finds a notable rise in the ocean floor he will “designate as a sounding.” Soundings are those black numbers on a nautical chart that tell you how deep the water is.
If the line has dots that rise up in a natural way, the computer program recognizes that these pings didn’t go as far down as the others and makes a rise in the ocean floor indicated with the blue line. It is the hydrographer’s job to review the computer processed data. One of the differences between a map and a nautical chart is the high level of precision and review to ensure that a nautical chart is accurate.
Now let’s kill some noise on this calm May evening.
In this image of a shipwreck on the ocean floor most sonar pings reached the ocean floor or the shipwreck and bounced soundings back to the survey boat. Look carefully, however, and you see white dots, representing pings that did not make it down to the ocean floor. Many things can cause these false soundings. In this case, I predict that the pings bounced back off of a school of fish. Here, the surveyor kills the “noise” or white pings by circling them with the mouse on his computer. It wouldn’t be natural for the ocean floor or other feature to float unconnected to the ocean floor, and thus, we know those dots are “noise” and not measurements of the ocean floor.
Lieutenant Smith estimates that at least half of his survey time is spent in the plot room planning or processing data. The window of time the team has in the field to collect data is limited by weather and other conditions, so they must work fast. Afterward, they spend long, but rewarding hours analyzing the data they have collected to ensure its accuracy and to provide synthesized information to put into a nautical chart that is easy to use and dependable. Lieutenant Smith believes that in many scientific careers, as much time or more time is spent planning, processing and analyzing data than is spent collecting data.
As we post process our data, I too, begin post processing this amazing adventure. I am hesitant to leave: I have learned so much in these two short weeks, I want to stay and keep learning. But at NOAA we all have many duties, and my collateral, wait–my primary duty is to my students and so, I must return to the classroom. I will leave many fond memories and a camera, floating somewhere in Driver Bay, behind me. I will take with me all that I have learned about the complexity of the ocean planet we live on and share my thirst to know more back to the classroom where we can continue our work. I will miss the places I’ve seen and the people I met but look forward to the road or channel of discovery that awaits me and my students.
Did You Know? The Sunflower Sea Star is the largest and fastest moving sea star travelling up to one meter per minute.
Below are a few photo favorites of my time at sea.
Much like the the lab reports we do in class, hydrographers have a tremendous amount of work to do prior to going into the field. As we make the transit from Rainier’s home port of Newport to our charting location of Kodiak Island, hydrographers are working long hours in the plotting room planning their season’s work. Today’s log is about a software program called CARIS that hydrographers use to plan their project and guide data collection through the season. This morning, Ensign Micki Ream planned her season’s work in the Plot Room on CARIS. This afternoon, she walked out the plot room door and onto the bridge where she navigated Rainier through the narrow Blackney Passage of the Inside Passage. Prior to taking over the bridge, I watched as Ensign Ream as she plotted her project area for the season. She has been assigned Cape Uganik, an area of North Kodiak Island in the vicinity of Raspberry Island. The area was chosen to survey due to boat traffic and because the last survey completed was in 1908 by lead line. Here you can see the original survey report and an image of how data was collect at that time (1908 Survey of Ensign Ream’s Survey Area). Ensign Micki Ream explained that the charts were called “sheets,” because originally, they were sheets of paper, sent out with the surveyor into the field. While we still call them sheets, they are now in electronic form, just like the sheet below representing one of two project areas ENS Ream will most likely work on this summer.
Why make polygons instead of sending several launches out to your work area and tell them to start on opposite ends and meet in the middle? The polygons are a way for hydrographers to break a large amount of work into manageable tasks. Commander Rick Brennan, the Commanding Officer, explains “polygons are designed based upon the depth of the water, the time it will take to complete, and the oceanographic condition, particularly speed of sound through water. Areas that are suspected to have a higher variability in sound speed will get smaller polygons to manage errors from sound speed.”
Also, imagine sending several launch boats out into a large area to work without telling them where to go. Polygons provide a plan for several boats to work safely in an area without running into each other. It allows areas to be assigned to people based upon their skills. The coxswains, boat drivers, with a lot of experience and skill, will take the near shore polygons, and the newer coxswains will take less hazardous, deeper water.
Another reason to break your sheet into polygons is to maintain team moral. By breaking a large task into small assignments people feel a sense of accomplishment. As she divided her large polygon into 30 smaller polygons, Ensign Micki Ream kept in mind many variables. First, she considers the depth of the water. The sonar produces a swath of data as the survey vessel proceeds along its course. As the water gets deeper, the swath gets wider, so you can make a bigger polygon in deeper water. As she drew her polygons, she followed contour lines as much as possible while keeping lines straight. The more like a quadrilateral a polygon is, the easier it is for a boat to cover the area, just like mowing a rectangular lawn. In her polygons, she cut out areas that are blue (shallow), rocky areas and kelp beds, because those areas are hazardous to boats. While the hydrographer in charge and coxswain (boat driver), should use best practices and not survey these areas by boat, sometimes they rely on the polygon assignment.
Once she has drawn up her plan, Ensign Micki Ream roughly measures the average length and width of her polygons and puts that data into a Polygon Time Log form that a co-worker created on Rainier last season. The form also takes into account the depth and gives an estimate of time it will take to complete the polygon. This Time Log is just one of the many pieces of technology or equipment that crew invents to make their lives and jobs easier.
The fun part of this process is naming your polygons so that hydrographers in the field can report back to you their progress. Traditional alphabetical and numerical labels are often used, but Ensign Micki Ream is naming some of her polygons after ’90s rock bands this year. Once the polygon is named, the sheet manager, Ensign Ream, develops a boat sheet for a hydrographer in charge (HIC): this is their assignment for the day. Typically, they send out three to four people on a launch, including the HIC, coxswain and an extra hand. There are always new people aboard Rainier, so there are often other people in the launch being trained. There are enough immersion suits for 4 people but ideally there are three people to help with launching the boat and completing the day’s work. Communication between the HIC and coxswain is essential to get data for ocean depths in all areas of their polygon as they determine the direction to collect data in their work area. Now, at least, the hydrographer and coxswain know where to start and stop, and are confident that their sheet manager has done her best to send them into a safe area to collect the data needed to make new charts.
Since Ensign Ream’s polygon plan is an estimate, the time to complete each polygon may be longer or shorter than estimated. Variables such as the constantly changing depth of the ocean, weather, experience and equipment of the crew collecting data, and a myriad of other variables, known and unknown, make scheduling and completing surveys a constantly moving target. There are two guarantees however: flexibility is required to work on the crew and ultimately winter will force a pause to Rainier’s work.
Spotlight on a Scientist
Although I have been on Rainier for only several days, I am blown away by the incredible skills crew members acquire in short amounts of time. Ensign Micki Ream is the perfect example: In January, 2013, she joined the NOAA Corps which provides operational support for NOAA’s scientific missions. During a six month officer training, she was trained in the basics of navigation. On June 2, 2013, she joined Rainier crew. In February, 2014 NOAA sent her to a one month Basic Hydrography School where she learned hydrography principles and how to use various software programs. Throughout her short time at NOAA, she has had significant and varied on the job training with scientific, managerial and navigational work.The rest of her skills are on the job training with an end goal of Officer of the Deck (similar to a mate in commercial sailing) and Hydrographer in Charge.
Ensign Micki Ream does have a background in science which she is putting to use every day. Originally from Seattle, she started her career with NOAA in June, 2009, after obtaining a Marine Biology degree at Stanford University. Her first position was with the Office of National Marine Sanctuaries Program, which provided her with an internship and scholarship to acquire a Master’s Degree, also from Stanford, in Communicating Ocean Science. Just a little over one year after coming to NOAA Corps, she is a hydrographer in training and safely navigating a very impressive ship as part of a bridge team, including highly skilled navigational experts such as Ensign J.C. Clark and Commander Brennan. Where else could you get training, experience and on the job support in so many diverse areas but with NOAA Hydro?
The food is absolutely amazing on board. Tonight’s dinner options were roast prime beef, cut to order, au jus, creamy smoked salmon casserole, farro vegetable casserole, baked potatoes with fixings, asparagus and several different kinds of cake and fruit. In the evenings, snacks are also available. My biggest challenge has been to pace myself with the the quantity of food I eat, particularly since taking long hikes after dinner is not an option. I feel very well cared for aboard Rainier.
NOAA Teacher at Sea
Denise Harrington Aboard NOAA Ship Rainier April 21 – May 2, 2014
Project: North Coast of Kodiak Island
Weather Data from the Bridge at 15:20
Wind: 11 knots
Visibility: 10+ nautical miles
Depth in fathoms: 66.1
Temperature: 9.8˚ Celsius
Latitude: N 48˚13.15 Longitude: W 123˚21.04
Science and Technology Log
My first log will be mostly about setting sail and the breadth of skills which each crew member is required to possess when working in hydrography, which is the science of surveying and charting bodies of water or seafloor mapping. Later, I hope to zoom in on the crew, scientists, and tools they use. Meetings….a time to get together with co-workers and catch up, and get a little work done. Not at NOAA: at 8:00 a.m. on April 21, Lieutenant Commander Holly Jablonski, Executive Officer called a meeting to let junior officers know the ship would be sailing at 12 p.m. Originally scheduled to depart on March 28, Rainier could not leave unless positions of highly qualified crew were filled, and difficult to replace parts were found and installed. Potentially hazardous ocean conditions would have delayed the departure another day so Officers were pleased the ship would depart. Members of the Junior Officer team proceeded to list off work they must complete to have the ship ready to sail in the next two hours, equipment to deliver, test and secure, and inspections to complete. Not a word was wasted. Within five minutes the meeting ended and each officer quickly returned to their many collateral duties. Ensign Katrina Poremba gave me a tour of the ship as we updated emergency billets, critical information that informs crew of their responsibilities during drills and actual emergencies. Before long, we were underway. Families of crew members wished them farewell, fair winds and following seas. As the ship pulled away, I entered the bridge, where Commander Rick Brennan, the Commanding Officer, and others were sailing the ship out of Newport Bay.
On the bridge, officers eyed a crabbing boat in “The Jaws,” the jetties at the entrance to Yaquina Bay, and mentioned that it did not appear to be making progress. With twelve foot swells, at 13 second intervals, the bar is a bit rough and it seems to me to be a risky place for a boat to turn around, but this is what the crabber did. Maybe it was too rough for them today, but now we had to pass them in a narrow passage with shifting depths. Lieutenant Junior Grade Bart Buesseler mentioned that Rainier’s hull is 16 feet deep and that a 2.5 million dollar piece of multi-beam sonar equipment sits at its lowest point of the hull. This is some of the best mapping equipment in the world. On the bridge, about seven officers and helmsmen maneuvered the ship around the crab boat in the narrow passage. An alarm sounded, signaling a low depth warning. I wondered about the wisdom of placing such expensive equipment in such a vulnerable position. Later I learned that the sonar equipment is protected by a steel shell called a gondola, but also that the equipment must be placed at this deepest location of the hull to maximize smooth sonar transmission and reception. Like the sonar equipment, I feel protected in the capable hands of Rainier crew. As each alarm sounded, several of the six officers moved to a variety of locations on the bridge to collect data about all variables, water depth, the distance to the crab boat, angle and speed of travel, swell and breaking waves. The crabber passed us uneventfully, and within seconds, we had breaking 12 foot waves on both sides. Avoiding hazards as we passed safely though the bar reminded me why accurate nautical charts, based upon reliable data, are necessary tools for all vessels. Gathering the data to create accurate charts is Rainier’s project this season.
After navigating us through the bar, several officers left and Starla Robinson, a senior survey technician joined us on the bridge to make sure we were collecting new information about the ocean depth as we travel north.
Rainier has a Multibeam Sonar System and a Rolls-Royce Moving Vessel Profiler (MVP) 200 sound speed acquisition system used to collect large amounts of data and make high resolution maps of the ocean floor. The sonar equipment gathered information represented on two screens on the bridge and multiple screens in the plot room, sending down pings through the water that bounce back up. Based upon the time it takes for the sound to return to the ship, the equipment measures the ocean depth. As a senior survey technician, it is Starla’s duty to coordinate between Field Operations Officer Quintero, “FOO,” and the crew on the bridge to follow a track line measuring ocean depth. She invited me into the plot room where many large computer screens display rainbow colored images of the ocean floor. There were divots in the rainbow image which Starla explains could be thermal vents, and blue dots, which could be schools of fish. Another unexplained change in the ocean floor caught her attention. She market that spot on the chart with a caption, “look later.” She said with a smile it might be a shipwreck that she planned on checking out that evening.
As we travel north on the map, the yellow swaths indicate areas already surveyed. Rainier’s current survey data is represented in black. This surveying is much like mowing the lawn, you want to travel in a track that matches the edge of a previous route and does not overlap significantly. All surveyors and officers spent time focusing on the collection of this data until the afternoon of our second day of travel, when we entered the Strait of Juan de Fuca, where the route is heavily traveled and well surveyed making additional data collection unnecessary.
In the past, ocean depth was measured with a lead line dropped into the water until it hit bottom.
Now, scientists use sonar or sound pings reflecting off the ocean floor, to measure depth much more efficiently. Several years ago, the Rainier crew surveyed an area of the Columbia River Bar in 1 ½ months might have taken 50 years worth of work under the old, lead line methodology. In addition, with the sonar method, scientists see the ocean floor in much greater detail, which no longer appears like dots, but instead comes back in a three dimensional image.
The track line survey on our route north is ancillary to the crew’s primary mission: to collect hydrographic data around Kodiak Island. This map shows where the crew will work this year, collecting depth measurements and reviewing data for accuracy.
I will be telling you more about sheet assignments and the review process later. Then survey technicians and officers file a report which becomes part of a new nautical chart, including areas identified as dangers to navigation.
Every conversation on board seems to include math and science. Johnny Brewer, a junior engineer who helps keep the ship moving forward, spoke of the need for everyone on board to have a good understanding of Algebra and Trigonometry, for anything from mixing paint to ship stability. A half hour later, on the bridge, the officers are discussing trigonometric formulas relevant to the length of anchor line. Many crew spoke of the training, testing and sea days NOAA provides so that crew members continue to develop a broad range of skills and move forward in their careers whether they are Stewards, Engineers, Survey Technicians or Officers. It is clear that math, science, technology and cross training for everyone play an important role in the daily lives of this NOAA crew.
Several crew spoke of the transit as an opportunity for some down time. Yet seeing how the crew multitasks constantly, all day and night, I wonder what the day will look like when we begin our hydro work in Alaska. Okay, maybe there is a little down time: here is a shot of me, Engineer Patrick Price and Starla Robinson, surveying by kayak the nooks and crannies of Canoe Island in the San Juan Islands. DID YOU KNOW? Newer ships hold effluent but because Rainier is a relatively older ship, it has a marine sanitation device (MSD) that separates sodium and chloride, making a chlorine solution from our waste, and sanitizing the effluent for discharge. To learn more about what happens in the MSD, here is a fun chemistry experiment you can try: http://integratedscienceathome.blogspot.com/2011/04/splitting-saltwater.html .
Weather Data from the Bridge Weather: Clear
Visibility: 10 nautical miles
Wind: 12 knots
Swell Waves: 1-2 feet
Air Temperature: 66.2ºF
Seawater Temperature: 64.8ºF
Science and Technology Log
Due to rough seas, we were not able to depart on Sunday. We waited until yesterday when the waves were only 3 feet at times (much better than 8 feet on Sunday). It took us 5 hours to travel from Savannah to Gray’s Reef National Marine Sanctuary (GRNMS). Once we arrived at the sanctuary, machines were calibrated and we began mapping the seafloor. The mapping will take 3 days running 24 hours a day. We are currently “mowing the lawn.” We started at one end of the sanctuary and are traveling in a straight line across to the other side of the sanctuary. Once we reach the edge of the sanctuary the ship turns around and we return to the other side slightly overlapping the previous path. The goal is to map the entire Gray’s Reef National Marine Sanctuary (GRNMS).
The seafloor is being mapped using a multibeam sonar. Multibeam sonar involves sending out 512 sound waves at once at different angles. The sound waves bounce off of the seafloor and are reflected back to receivers on the ship. There are a series of computer programs that uses the information to calculate the distance the wave traveled (depth of the ocean) and generate an image.
The scientists and technicians need to avoid errors while mapping and therefore need to account for the tides, the differences in the temperature and salinity of the water as well as sound velocity. There are several tools and computer programs used to avoid errors and adjust any differences. One of these tools is the CTD (Conductivity, Temperature, Density). The CTD is deployed off of the back of the ship. It is sent down a cable to the seafloor. As it descends it is gathering data and sending the data to a computer in the lab. The scientists and technicians make adjustments to the computer programs using this data and can compensate for again changes in the water column.
Several other projects will be conducted on this mission as well, but most will not begin until Thursday when the dive team arrives. These will include Marine Debris Surveys, Lionfish Removal, Sea Turtle data collection, and Fish Telemetry. In preparation for these projects, a small dive boat was just deployed off the ship. Chief Scientist, Sarah Fangman, with a few crew members went in the boat to test the marker drops. The divers will be looking for very specific sites. It is important to precisely mark the sites from the surface so that the divers will easily be able to find the spots or objects that they are looking for.
The Nancy Foster carries 3 small dive boats. The boats need to be lowered into the water using the crane located at the back of the ship. It is a group effort to deploy these boats. A member needs to operate the crane and four others use guide ropes to assist in lowering the boat. Once the boat is in the water, members need to crawl aboard using a rope ladder that is connected to the Nancy Foster.
I have quickly learned that the most important skill on the ship is teamwork. One person cannot do it all. From safety procedures to gathering data to the general functioning of the ship, you need to work together.
Did You Know?
When using Sonar, extra sound waves are generated. This was once thought to be background noise. Scientists now call this Backscatter and can analyze this data and determine that type of seafloor bottom or the sediment that is present (sandy, rippled, hard bottom).
Happy Earth Day!!! I can’t think of a better way to celebrate this beautiful planet than sitting out on the deck enjoying the vast ocean. Or by submitting a Selfie to NASA to participate in their Global Selfie Project to create an image of the earth using selfies from around the world.
I have been aboard the Nancy Foster for four days now. I arrived in pouring rain on Friday night so I did not really get to explore the ship that night. On Saturday, I assisted with an Open House on the Nancy Foster where the public was able to tour the ship. Members of the GRNMS including Chief Scientist Sarah Fangman, Acting Superintendent George Sedberry, and Communications and Outreach Coordinator Amy Rath led the tours. Financial and IT Coordinator Debbie Meeks, volunteer Marilyn Sobwick and I signed people up for the tours and discussed GRNMS, NOAA, and the upcoming mission with the public. It was a wonderful experience being able to meet new people and introduce them to the Nancy Foster and Gray’s Reef.
I was all ready to set sail on Sunday, but the weather had different plans. We were all boarded on the ship and the crew was making the final preparations when it was decided to postpone the trip. The waves were 8 feet tall at Gray’s Reef. The rough water would have made it impossible to create an accurate seafloor map. Since that was the only task we had, the trip was postponed.
We were able to set sail yesterday. It was a beautiful day, as it is today. It is gorgeous outside with warm weather and calm waves. I have found several wonderful spots to sit outside and enjoy the ocean.
Many of my students had several concerns about life on the ship. Living on the Nancy Foster is quite comfortable. I am staying in a four person stateroom. Right now I am
sharing it with Amy who is a great roommate. We each have our own bunk with a curtain for privacy. The bathroom, or Head as it is called on a ship, is down the hall. I do feel like I’m back in college sharing a bathroom. The Galley (or kitchen) and Mess (dining room) is directly across the hall. As for my students who were very concerned about food – I am eating VERY well. The Nancy Foster has 2 amazing stewards, Lito Llena and Bob Burroughs, who are wonderful chefs. Yesterday they made a Ginger Chicken Soup that was honestly the best soup I had ever had. Many crew members tell me that the Nancy Foster is one of the best fed ships. I can agree. As for entertainment, the ship has a gym, tv and games in the galley, and a Movie Room!
Some of my students were very concerned about my safety. NOAA Ships want to make sure everyone is prepared for any situation. They are required to conduct weekly drills and all members aboard must participate. We practiced what to do in a blackout situation or how to find your way if you have chemicals in your eyes. We did this by being blindfolding and finding your way out of ship or to an eyewash station. We also practiced an Abandon Ship drill. We had to put on our survival suits and get to our life rafts. I am glad we are prepared.
NOAA Teacher at Sea Paige Teamey Aboard NOAA Thomas Jefferson October 31, 2011 – November 11, 2011
Greetings, my name is Paige Teamey and I will be sailing on NOAA Ship Thomas Jefferson as part of NOAA’s Teacher at Sea Program. I am a graduate ofWheaton College with a double major inPhysics and Environmental Science. I am a native Oregonian, but have called Brooklyn, NY home for the last eight years. I love the outdoors and have had many opportunities to explore upstate New York and observe a side of the east coast that is raw and beautiful. I have a great love for being outside and spending as much time as I can with my family.
I have lived and taught high school earth science, anatomy and physiology, forensics, experimental design, and material science for the past seven years at Brooklyn Academy High School. I deeply enjoyed the students I taught as well as the faculty and community that existed at the school and in the neighborhood of Bed-Stuy.
I departed from Brooklyn Academy this year to follow a passion and help provide students at a younger age access to science and engineering with Iridescent. Iridescent is a non-profit science and engineering educational organization located in Hunts Point, NY where our vision is to use science, technology and engineering to develop persistent curiosity and to show that knowledge is empowering. Iridescent is a community-based educational outreach organization that supports student growth through lifelong mentorships and community sharing, development, and learning.
Hunts Point is located on a peninsula and is home to the largest food distribution site in the world as well as the largest fish market in the world outside of Japan. Hunts Point receives enough food annually by ship to feed 30 million people in and around New York City. Hunts Point is atidal strait located between the Bronx River and the East River. Each ship that travels from their homeland bringing products to NYC relies on nautical charts in order to steer around shallow areas, especially at low tides (check out the current moon phase today). On my voyage with NOAA, I will learn how to conduct seafloor mapping (hydrographic surveying) of Block Island in order to update and generate nautical maps.
95% of our oceans have yet to be explored!!! Humans have only researched, taken data, and “observed” 5% of our Earth’s watery shores. Gene Feldman an oceanographer and earth explorer stated it best by describing the ocean as a really a hard place to work in the following statement,
70% of our world contains OCEANS.
“In many ways, it’s easier to send a person to space than to the bottom of the ocean. The ocean is dark and cold. In space, you can see forever. Deep in the ocean, you can’t see much. Your light can’t shine very far.”
Life exist in a very small slice on land when compared to the enormous depths of our oceans.
Life on land occurs in a very thin layer from just below the ground to the tops of our tallest trees (about 1 mile or 20 blocks) . In the ocean life occurs in every layer where some areas are more than seven miles deep (140 blocks). NOAA (National Oceanic and Atmospheric Administration) is an amazing organization that has hundreds of scientists and engineers exploring and learning about our oceans everyday. NOAA shines new light on our oceans unexplored worlds everyday.
For the students and families following my journey Shine your light!! Be curious with a passion. Keep your eyes open to the skies, below your feet, into the wind, with every step to school/work or while sitting in silence… question everything. I look forward to bringing you answers and videos to any questions or any interests you have about my journey. Click on the words when they are highlighted purple/blue in order to learn more.
You can follow my journey and adventures in this blog and daily ship position via theNOAA Ship Tracker. Just click on the hyperlink, enter the ship tracker and select the Thomas Jefferson from the drop down menu on the right side of the screen.
NOAA Teacher at Sea
Onboard USCGC Healy
August 7 – September 16, 2009
Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey Location: Beaufort Sea, north of the arctic circle Date: September 5, 2009
Weather Data from the Bridge
Latitude: 770 13’N
Longitude: 1370 41’W
Science and Technology Log
More Ways to Use Sound to See Beneath the Sea Floor
Today we “rafted” with the Louis (the ships tied together side by side). I have been eager to see the science instruments that the Canadian ship is carrying. Once the ships were securely tied together we could just walk back and forth between them and tour the Canadian vessel.
The Healy has been breaking ice so that the Louis can have an easier time collecting data using seismic reflection profiling. The goal is for the Canadian scientists to determine how deep the sediments are in this part of the Arctic Basin. The sound waves their instrument sends out can penetrate about 1500 meters below the seafloor. Using sound they can “see” inside the earth – amazing!
FOR MY STUDENTS: Remember your Latin/Greek word parts? Look up “seism”.
Here is how it works. The Louis steams forward at a low speed following in the path that the Healy has created through the ice. The Louis tows behind a weighted sled with 3 airguns suspended from the bottom. This sinks about 10 meters below the water. Attached to the sled is a long tube filled with hydrophones (underwater microphones) called a streamer. This streamer is about 400 meters long and stretches out behind the ship. It is best for the ship to move continuously so that the streamer will not sink or float to the surface.
FOR MY STUDENTS: Try to picture a 400-meter long “tail” on a ship. That is longer than 4 football fields.
The airguns create a huge air bubble in the water. When it collapses, it creates a sound pulse. Two of the guns use a low frequency, which will penetrate deep into the sea floor but will create a low-resolution image. The other gun uses a high frequency, which does not penetrate as deep but gives a high-resolution image. The 16 sound recorders in the streamer record the echo created by these sounds reflecting from the sediment layers below the sea floor. The final product this instrument creates is an image of a cross section through the Earth. Scientists can look at these by observing this geologic history, the scientists are looking back in time. You can imagine that ice can cause lots of problems when a ship is towing a 400-meter long streamer behind it. This is why we are working on collecting this data together. One ship breaks, the other collects the seismic reflection data.
The crew has been looking forward to the two ships tying up together for the entire cruise. Everyone is curious about the other ship. What are the staterooms like? What is the food like? How is their bridge different from our bridge? And of course there is shopping!! Both of the ship stores had their best Louis and Healy gear ready for the eager shoppers.
After learning about the science instruments aboard the Louis, it was nice to finally see the seismic sled, streamers, and the computer nerve center where the seismic images are received. The ships are pretty different in their appearance. The Louis is an older vessel and has wooden handrails, panels cover the wires in the ceiling, and there are some larger windows with actual curtains. The Healy was built to be a science research icebreaker and so has many large spaces for science and looks generally more industrial. The Louis was an icebreaker first and some of their science spaces have been added later and are less spacious.
Shopping and tours were fun but the most anticipated events of the day were the evening meal, contests and games. The ship’s officers exchanged gifts in a formal presentation and then we had an amazing buffet together. Personnel from both ships enjoyed scallops, halibut, salmon, shrimp, lobster, pork, beef, cheese, salads, and desserts. This was an exceptional meal and a great social event. The idea of having Teachers at Sea (TAS) was a new one for most Canadians I spoke with and as we talked they seemed to think this TAS would be a great idea to stimulate interest in young Canadians about maritime careers. The evening concluded with some friendly competitions between the crews and the science parties. This entire event was a lot of work for the Coast Guard crews. The science party really appreciates all the hours they put into planning this event!
NOAA Teacher at Sea
Onboard USCGC Healy
August 7 – September 16, 2009
Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey Location: Beaufort Sea, north of the arctic circle Date: September 3, 2009
Weather Data from the Bridge
Latitude: 780 34’N
Longitude: 1360 59’W
Science and Technology Log
Some of my previous logs have talked about sound in the Arctic Ocean. Sounds made by seals, whales, ice cracking and ridges forming, bubbles popping, wind, waves – these are the normal or ambient noises that have always occurred. As governments, scientists, and corporations explore the Arctic their presence will have an impact. Ships breaking ice and the seismic instruments they use to explore, add noise to the environment. We call this man-made noise, anthropogenic noise. Will these additional sounds impact the organisms that live here? Can we explore in a way that minimizes our impact on the environment? The marine wildlife of the Arctic has evolved in an ocean covered by ice. But the ice is changing and the human presence is increasing.
Studies of other oceans have shown that more ship traffic means more background noise. In most regions of the Pacific Ocean the background noise has increased 3 decibels every 10 years since the 1960’s. The scientists on the Healy and the Louis are interested in minimizing their impact as they explore the Arctic Ocean.
Do No Harm – Step 1 Collect Data
One of the ways we are listening to the noise that our own instruments make is with sonobuoys. These are devices that help us listen to how sound propagates through the ocean. While the Louis is using airguns to collect seismic data – scientists on the Healy are throwing sonobuoys into the ocean to listen to the sound waves created by the airguns. Knowing how the sound waves from airguns travel through the water will help us to understand their impact on the environment. Sonobuoys are self-contained floating units. They consist of a salt-water battery that activates when it hits the water, a bag that inflates with CO2 on impact, a 400-foot cable with an amplifier and hydrophone (underwater microphone).
The data acquired through the sonobuoy are relayed to the ship via radio link. A receiving antenna had to be placed high up on the Louis in order to collect this data. Like many of the devices we are using to collect information, the sonobuoys are single use instruments and we do not pick them up after their batteries run out. After 8 hours of data collection, the float bag burns and the instrument sinks to the bottom. They are known as self-scuttling (self-destructing) instruments. The more we know about the sounds we make and how these sounds are interacting with the animals that call the Arctic home, the better we will be at low impact exploring.
I’ve had lots of questions from students about the weather. For most of our trip, the air temperature has been around 270F and the visibility has been poor. A log fog has prevented us from seeing the horizon. We have also had quite a few days with snow and freezing rain. Some of our snow flurries have coated the decks with enough snow to make a few snowballs and prompted the crew to get out the salt to melt the slippery spots.
This past week we had some seriously cold days. On September 1st, the air temperature was 160F with a wind chill of -250<