teacher at sea – Page 7 – NOAA Teacher at Sea Blog

May 13, 2013August 11, 2021

Bill Lindquist: The Small Boats, May 10, 2013

NOAA Teacher at Sea
Bill Lindquist
Aboard NOAA Ship Rainier
May 6-16, 2013

Mission: Hydrographic surveys between Ketchikan and Petersburg, Alaska
Date: May 10, 2013

Weather on board. Taken at 1600 (4:00 in the afternoon)
Latitude: 55° 47.29’ N; Longitude 130° 58.27’ W

Broken skies with a visibility of 10+ nautical miles
Wind from the west at 15 knots
Air temperature 12.6° C
Sea temperature 8.9° C

Science and Technology Log: The Small Boats

Yesterday the ship captured most of the ocean basin using its multibeam sonar equipment located on the bottom of the ship. Today we set out in smaller launches that could take us to the sections of the ocean the big ship couldn’t. Three teams were deployed, each containing a coxswain (person who has the skills to handle the boat), senior hydrology technician (in charge of the survey work to be done), and several others to help – one boat of which was gracious enough to take along a rookie “Teacher of the Sea” to experience first hand the work involved.

Moving the launch off the ship into the sea.

Trying out driving the boat is a prescribed line (harder than it would appear). — Trying out driving the boat in a prescribed line (harder than it would appear).

We all met on the fantail (rear deck) of the ship at 6:30 AM to go over the work that lays ahead. From there the launches were lowered off the ship, we entered, were released, and off we went. While still in the early morning low tide we examined the shoreline to verify the existence or non-existence of rocks in question from the last survey. We conducted our surveys throughout the rest of the day in areas not able to be accessed by the larger ship. Each launch is also equipped with multibeam sonar units on the bottom of the boat (image) and a plotting computer on board. As with the ship, the computer measures and controls for location (GPS); heave, pitch, and roll; and the temperature and salinity of the water column below our boat.

The multibeam sonar units on the bottom of the launch.

The plotting computer aboard the launch.

The work is similar, yet has a different feel. Unlike the automated features on the ship, a control panel allows the surveyor to hand tune variables that will help assure the best measurements. We can control the strength of the sound waves leaving the boat, the frequency of pings, wave length, and the degree of sweep that will be collected. Doing so allows us to maintain sufficient strength to capture tbe bottom, but not so overpowering that we lose the finer details such as the makeup of the bottom. Each boat sets a path back and forth at a speed of 7-10 knots in the sections assigned by the FOO (Field Operations Officer). This is repeated until each section is covered. This takes a concerted and collaborative effort between the coxswain and technicians. When surveying from the ship, the Moving Vessel Profiler’s fish can be cast by the push of a button at the computer in the Plotting lab. Not so on the launch. After bringing the boat to a stop, we lift over the CTD (conductivity, temperature, depth) instrument. We allow it to drop to the bottom before we turn on the winch to reel it back in. It is lifted out and attached to a cable connected to the computer where the data is downloaded.

One of the screens on the plotting computer indicates the areas that have been surveyed (in blue) and where the ship is.

Before we get back to the ship, we download the day’s data to an external hard drive and hand it off to another crew that begins the job of cleaning the data to be pieced together with all the other sections of data. We end with one complete picture of the project area.

Life at sea

There are 46 people living and working on board the ship. The launches go out with a smaller group of 4. Spending all day on a small boat with three other people necessitates attention to clear communication channels. The waves continually keep the boat in motion providing a challenge to manipulate the mouse and detail on the computer screen. In between there are many moments of quiet allowing for conversation and banter. It is in those moments you get to know one another better and forge strong relationships. This close community is evident among the crew on board. Such is the allure of sea life.

Sunny days

In anticipation of a trip to SE Alaska, I did a bit of research on what kind of weather to expect. Ketchikan is in a rain forest and noted for being the rainiest city in the United States with an average rainfall of 160 inches a year. Since my arrival, I have enjoyed sunshine and calm seas. People have assured me how unusual this is and to expect a change. The forecast for tomorrow suggest the change will arrive. Seems to experience life at sea without a bout of inclement weather would not allow full appreciation of the grandeur we have had. I will take them both expecting there will be equal beauty in the rain and clouds.

I continue to be amazed at the majesty of the landscape.

May 13, 2013August 11, 2021

Bill Lindquist: Mapping the Ocean, May 9, 2013

NOAA Teacher at Sea
Bill Lindquist
Aboard NOAA Ship Rainier
May 6-16, 2013

Mission: Hydrographic surveys between Ketchikan and Petersburg, Alaska
Date: May 9, 2013

Weather on board. Taken at 1600 (4:00 in the afternoon)

Clear skies with a visibility of 10+ nautical miles
Light variable wind
Sea wave height – O
Air temperature 17.3° C
Water temperature 7.2° C

It's hard to get enough of this majestic view. — It’s hard to get enough of this majestic view.

Science and Technology Log: Mapping the Ocean

The work we do on board the Rainier is all centered on the task of gathering data of the ocean bottom – shoreline to shoreline. These data are used to update the nautical charts (maps) used by sailors. The project we have been working on is a section of Behm Canal in SE Alaska.

Hydrographic data on parts of this stretch of water haven’t been updated for over 100 years. The tools and methods utilized have changed significantly during that time. Hydrographers of 1900 lowered a rope tied to a lead weight to the ocean bottom. Measurements were taken on the length of rope. The area we were surveying ranges from 150 to over 300 fathoms (one fathom = 6 feet) deep – that is a lot of rope. At each measure, they sighted a bearing to two or more locations on shore to locate where on the chart they could mark the depth. It’s surprising how closely their data matches what we found with the use of sophisticated modern techniques.

So how is it done? A good activity in the classroom is to make a sounding box with an ocean floor shaped on the bottom of the box. The top is covered and marked with a grid. Skewer sticks can be inserted at the grid corners, pulled out, measured, and transferred to another grid. A map is made. If only it were as easy. Simply put, modern hydrographers ping sound waves (sonar) from the bottom of the ship. The sound waves travel through the water to the ocean bottom and bounce back. We know how fast sound travels so measurements of time can be made and the distance calculated – just like the skewer sticks. If only it were as easy!

See the following website for information on hydrographic survey techniques. http://www.nauticalcharts.noaa.gov/mcd/learnnc_surveytechniques.html

My learning curve has been high as I have tried to understand all the moving variables that need to be taken into account before an accurate map can be made.

Here’s what I am beginning to understand:

Starts with referencing benchmarks – both vertical and horizontal (see blog, May 7) to gain a standard of tidal variation (high and low tide can vary by as much as 20 feet) and GPS location.
A measurement is made from the ship’s deck to the water surface. The twin sonar beams are located on the bottom of the ship. We know how far it is from the bottom of the ship to the deck – subtracting the deck to the water line gives the distance below the surface the sonar equipment is found at the time of measurement.
The chart is marked off in rectangles. A line is marked for the ship to follow. Traveling at 10 knots, the multibeam equipment located on the bottom of the ship pings sound waves and measures how long they take to return from the bottom. A broad swath of ocean bottom can be measured at the same time. These data are transferred to a computer in the plotting lab where the computer archives it and generates visual images as they come in.
The speed of sound varies in different water conditions, including temperature and salinity. Making it more complicated, temperature and salinity varies by depth in the water column beneath the ship. To capture these variables, we cast out a Moving Vessel Profiler (MVP) behind the ship while we travel along. The MVP looks like a small torpedo and is affectionately referred to as the fish. Attached is a sensor that reads temperature, conductivity (a measure for salinity), and depth. These data are transferred along a cable bound within the attached line to a computer on board the ship. “Casting” the fish means letting the line out until the fish approaches the bottom of the ocean – or 500 meters of line – whichever comes first. At that point the fish is retrieved. The data acquired as the fish makes its journey is transferred to the Plotting Lab computer.
The sensor on the “fish” captures temperature, conductivity, and depth data on the water column beneath the ship.
As the ship moves along the ocean surface it is subjected to constant movement. It pitches up and down from front to back (pitch), rolls side to side (roll), and rises up and down with the ocean swells (heave). As the survey data is collected, heave, roll, and pitch data is captured to allow for adjustments in the sonar data. All of this varies further with the tide level. All these data are captured and fed into the Plotting Lab computer.
Data from the ship’s multibeam sonar comes to the Plotting Lab
The ship travels its projected line, turns around and comes back on another.
Small boats with similar beams are dispatched to capture the same measurements closer to the shoreline where it is too shallow for the ship (for tomorrow).
This continues until the full ocean bottom in our project area is captured.
Finally all these data sets are brought together and stored.
During the off season, the data sets are utilized to generate the finished nautical charts ending a long, sophisticated process.

Personal Log: Life on the sea

I have to admit the living spaces on board a working ship are a bit tight. My “state room” measures approximately 10’ x 12’ and is shared with a roommate. In that space are our bunk beds, a sink, desk, and locker closets. I can’t sit up in bed without hitting my head on the bunk above. Shared between two rooms is a bathroom that is only 4’ x 8’ with a head (mariner’s term for a toilet) and shower. All this space rests on a floor that drops with the curve of the ship approximately 10” from one end to the other. The hallways in the ship are narrow and the stairways steep. Everything is bolted or tied to the floor or table to keep them from being tossed about in choppy waters.

While tight, I have yet to hear anyone wish for more. Perhaps the salt that runs in their mariner blood provides the sustenance they need to thrive in these close quarters at sea.

While my shipmates will call the Rainier home for the duration of the research season, I will be on board for only two weeks before I return to the comforts of my own home and spacious bed. I have to respect these hardy folk for who they are and all they do.

A cozy state room at sea - looking toward the door. — A cozy state room at sea – looking toward the door.

The shared "head" offers the comforts of home. — The shared “head” offers the comforts of home.

A porthole window offers a majestic view.

May 9, 2013August 11, 2021

Bill Lindquist: Setting Benchmarks, May 7, 2013

NOAA Teacher at Sea
Bill Lindquist
Aboard NOAA Ship Rainier
May 6-16, 2013

Mission: Hydrographic surveys between Ketchikan and Petersburg, Alaska
Date: May 7, 2013

Weather on Board
15 C
Wind at 7 knots
Clear skies

Science and Technology Log: Setting Benchmarks

To conduct accurate surveys of the ocean bottom, clear reference points must first be established. Today, I joined a shore team to permanently set official benchmarks into the rock. Yesterday a team located two existing benchmarks in Burroughs Bay, including one put in place in 1891. A hole had been chiseled into the rock followed by a circle around it and an “X” crossing through the hole from one side of the circle to the other. Above the letters B and M (benchmark) were carved in the rock. Weathering and plant growth provided a challenge. There is something intriguing in the transcendence of time, updating work that was performed over a century ago.

Installing a vertical staff to reference visual measurement with electronic

To establish a vertical standard, three new brass benchmarks were cemented into rock with the intention of lasting into the next century. All five benchmarks were precisely located to reference elevation to local tidal data acquired through an electronic tidal gauge installed to capture 30 days of high and low tide data. A diving team anchored one end of a line underwater well beyond the reach of low tide. The other end rose on land high enough to be protected from high tide. These tidal data will be referenced to a visual measurement taken every six minutes for three hours from a vertical staff we installed.

Tomorrow a team will install a horizontal control (horcon). A marker was affixed on an island that would collect location data from Global Positioning Satellites (GPS). GPS data is close, but lacks precision. The variance in GPS data will be referenced to the precise location of the horcon to establish an accurate and stable benchmark for all the survey data we will be making.

This preparation and collection of vertical and horizontal benchmarks all come together to provide referential data utilized in the precise creation of updated nautical charts.

Personal Log: Life at Sea (continued)

I had the good fortune to join the Rainier community on the first leg of the 2013 field season and experience early preparation drills and equipment training. En route from Ketchikan to Behm Canal, ship wide emergency drills were conducted to ensure everyone is fully prepared for a quick response to any situation that might arise. The fire drills I am familiar with is limited to getting all kids safely out of the school building, doing a head count to assure all are accounted for, waiting for the all clear, and bringing them back in. A call is made to the fire dept to respond if necessary.

At sea, the fire department is the community on board the ship. Should an emergency arise, lives depend on the preparedness of every individual on board. Our fire drill was an authentic drill. A fire alarm signaled the bridge there was a fire in the laundry room. The bridge quickly alerted all hands on deck. Everyone reported to pre-assigned stations, head counts were made and reported in. The fire response team got the necessary equipment out and evacuated the smoke (the smoke was real). There was no fire department to call. Our lives depended on our own actions.

Another alarm alerted everyone to a catastrophic problem necessitating a call to abandon ship. All hands quickly grabbed their emergency flotation suits readily available in their state rooms and reported to pre-assigned stations where a head count was made. These suits, specially designed to keep us afloat and dry, were quickly donned. This was one we never had to practice in school.

Potentially dangerous work in remote locations necessitates carefully scripted and practiced safety habits. Teams go out in small boats to conduct any necessary work on shore and survey areas too shallow for the ship. All these teams must remain in radio contact and make hourly reports to the ship’s bridge assuring all are individuals are safely accounted for. Should anything happen, there are Rainier crew members that have received specialized medical training preparing them to respond to medical issues occurring on board.

At sea, lives of all on board are in the hands and actions of all on board. Preparedness is key. I am thankful for that commitment.

Did you know?

The speed of the ship is not controlled by changing the speed of the engine. The ship’s engines are most efficient when they can maintain a steady speed (revolutions per minute). Instead, the ship’s speed is changed by altering the pitch of the screws (propellers). As the screw turns in the water a difference in pressure from the front to back is created. This pressure difference creates thrust. The more inclined the blades of the screw are, the faster the ship will travel. There are times during the survey when the ship must come to a full stop. Even then, the propeller shafts continue to spin but rotate in a flat plane resulting in no thrust.

April 26, 2013August 11, 2021

Angela Greene: “And So the Love Story Begins… “ April 25, 2013

NOAA Teacher at Sea
Angela Greene
(Almost) Aboard NOAA Ship Gordon GunterApril 29-May 11, 2013
Mission: Northern Right Whale Survey

Geographical Area of Cruise: Atlantic Ocean out of Woods Hole, MA
Date: April 24, 2013

Personal Log:

I am quite certain I am about to fall in love with a whale, as I embark upon a journey that will surely change me forever. My name is Angela Greene, and I have had the honor of teaching middle school in the Tecumseh Local School District for the last twenty-five years!

TMS — Tecumseh Middle School: “Home of My 8th Grade Scientists!”

I care deeply about my students, and I am committed to providing them with amazing science experiences in my classroom! I love my job, my students, and learning. I am a NOAA Teacher at Sea!

I applied for the NOAA Teacher at Sea program because I believe the best way to develop myself, as a professional educator is to seek out field experiences that will enable me to work side by side with leaders in the scientific community. I can’t think of a better way to efficiently expose my students to careers in the field of science as well as the scientific issues that will directly affect their lives than to “walk in the shoes” of highly trained scientists.

Kristin and Me — “Walking in the Shoes of a Scientist”: Me with Dr. Kristin Stanford, Lake Erie Water Snake Recovery Plan Coordinator

The purpose of this blog is to tell my family, students, friends, and colleagues a story, a love story, if you will. I hope to share my love of teaching, my love of wildlife, and my insatiable love for learning.

In only a few hours, I will fly to Boston, Massachusetts, take a bus to Woods Hole, and board the NOAA Ship Gordon Gunter. The ship will take me, as well as a group of ocean scientists, into the Northern Atlantic to search for the critically endangered Northern Right Whale.

At this point, I know very little about this mammal, so I enlisted the help of my 8^th grade scientists using a technique I called “Teach Your Teacher”. Together, we brainstormed a list of questions about Right Whales, the Gordon Gunter, and marine research. Each student selected a topic, complied a summary of their findings and wrote me a quick “good bye” note. I collected the pages and promised not to read them until I was on the bus to Woods Hole.

Tecumseh 8th Grader Researching Whale Biopsy

I also wanted my students to have an understanding of the actual size of Northern Right Whales and other North Atlantic Whale species. We celebrated our new learning and my incredible opportunity to sail with NOAA by having “Tecumseh Middle School Whale Day”. For one day the concrete campus of our school became ocean habitats to student-created “chalk whales”. We calculated the actual size of four whale species using the scaled measurements of sketches found in our research. This data enabled us to create over forty whales using sidewalk chalk! We were amazed at the size of our whales, and the chalk models enabled us to compare the external anatomy among the species. Our local news channel, WDTN, stopped by to film us for the evening news! We determined that 14 middle school students could fit head to toe along the length of a fin whale. We had a terrific day!

My preparation time is coming to an end. I need to finish packing, say my goodbyes to my family and dogs, and focus on the journey that’s about to begin. One of the most important lessons a teacher can learn from rare field experience opportunities is that this time will quickly end. I promise to enjoy every second while I am falling in love with a brand new world.

14 in Fin — Fourteen Tecumseh Students Fit Head to Toe in a Chalk Fin Whale

rightwhale_baleen_georgia — Northern Right Whale (Photo Credit NOAA)

April 8, 2013August 11, 2021

Rita Salisbury: Seagoing Safari, April 11, 2013

NOAA Teacher at Sea
Rita Salisbury
(Soon to be) Onboard NOAA Ship Oscar Elton Sette
April 14 – 29, 2013

Mission: Fisheries Research
Geographical Area of Cruise: Hawaiian Islands
Date: April 11, 2013

Personal Log

When I was a teenager taking part in a marine biology camp and working at a state park, if you had told me that I would be a high school biology teacher, I would not have believed you. If you had told me that I would still care deeply about our environment and the interconnectedness of living things, I’m sure I would have agreed. However, I do not think either of us could have foretold that I would be one of 25 people chosen this year by NOAA (National Oceanic and Atmospheric Association) to participate in its Teacher at Sea program.

My name is Rita Salisbury and I teach biology at Delaware New Tech Academy (DNTA) at my alma mater, Seaford Senior High School in Seaford, DE. DNTA is a project-based learning environment where students work in collaborative groups and develop skills critical to success in college and the workplace. I actually co-teach with a Literature teacher and we have a combined class of BioLit. We spend a lot of time planning projects that are based on real-world connections that engage our students while covering content standards.

I applied to the NOAA Teacher at Sea Program for a few reasons. First, the research cruise will be rife with opportunities to make connections with scientists and I will be able to draw on the experience to help make my classes more meaningful and realistic. Second, I am always up for an adventure. I love learning and new experiences, so Teacher at Sea seems custom-made for me. Four years ago I was awarded a grant to visit the Galapagos Islands and it was one of the most interesting, engaging, and full-of-learning experiences I have ever had. I know that my time aboard NOAA ship Oscar Elton Sette is going to be another great experience, too!

My son, Aaron, and I at the Darwin Research Center on Puerto Ayora, Galapagos Islands, Ecuador — My son, Aaron, and me at the Darwin Research Center on Puerto Ayora, Galapagos Islands, Ecuador

I am from a small farm on the Delmarva Peninsula, with the Atlantic Ocean a few miles to the east and the Chesapeake Bay to west. Crabbing and fishing were common summertime activities for kids when I grew up but most of my students have never had the opportunity to take part in either due to changes in the water quality. I am looking forward to incorporating what I learn on the Sette into projects for my students in order to create an awareness of the area in which they live and its historic marine culture. With that awareness as a foundation, can an interest in improving the bays and their tributaries be far behind?

I am waiting (very impatiently, I might add!) to meet the chief scientist and the captain and crew of the ship. What I know so far is that the the principal scientific objectives of the project will be focused on the research and development of sampling methods used in assessing fish populations. It will include using acoustics, cameras, and hook and line fishing. This is going to be a blast!