NOAA Teacher at Sea
Dorothy Holley
Aboard NOAA Ship Pisces
July 31 – August 15, 2025
Blog Post #6
Mission: Northeast Ecosystem Monitoring Survey (EcoMon)
Geographic Area of Cruise: Northwest Atlantic Ocean
Date: August 11, 2025
Weather Data from Bridge:
Latitude: 3956.51 N
Longitude: 07043.5 W
Relative Wind speed: 17
Wind Direction: 336
Air Temperature: 23.6
Sea Surface Temperature: 24.965
Barometric Pressure: 1022.81
Speed Over Ground: 9.8
Water Conductivity: 5.326
Water Salinity: 35.03125
Miles and Dorothy launch the drifter!
First, Janice from NC is asking about the drifters! In my first blog I mentioned the Global Drifter Program. Since 1979 countries have been placing and monitoring drifters around the world to better understand and make better predictions . Amanda, Miles and I launched the last of our drifters yesterday.
Sam Ouertani, CIMAS (UMiami/NOAA) Research Associate, provided the following answers to Janice’s questions:
How long are the drifters collecting information?
> Drifters typically collect data until the drifter runs aground, the batteries die, or the sensors die. Most drifters are able to collect data for 450 days, however they typically lose their drogue within a year. Without a drogue, data from drifters cannot be used to accurately estimate the surface current velocities, but drifters are still able to measure sea surface temperature and other parameters if equipped with additional sensors.
Are there cameras on the drifters?
> Unfortunately, Global Drifter Program drifters don’t have cameras but several programs in NOAA have started to add cameras. The National Data Buoy Center has added cameras to almost 100 buoys. I believe the Arctic Buoy Program has started adding cameras to observe sea ice conditions, but footage is not yet available.
Do they collect data about depth of the ocean?
>Drifters only collect data at the surface of the ocean; therefore they don’t measure any parameters below the surface, and they do not measure sea floor depth. Another NOAA program, Argo, collects temperature, salinity, and pressure below the ocean surface, but Argo floats do not reach the bottom of the ocean.
Where’s the deepest part?
>The deepest part of the ocean is the Challenger Deep, 35,876 feet deep or over 6.7 miles deep, located in the Mariana Trench. Humans measured this depth by lowering a rope from a submersible vehicle.
Thank you Sam for such thorough answers, and thank you Janice for asking! You can find more information about the drifters we launched here.
Second, an answer to the math problem from the last BLOG: On the First Christmas Bird Count, 18,500 individual birds were logged by the 27 participants. On average, 685 birds were seen by each person. That’s a lot of birds! (The numbers 25, 89, and 1990 were not used to solve the problem.) How do you think that number compares to today’s counts?
Science at Sea: If steel is heavier than water, how does the 1840-metric ton Pisces stay afloat? Her density, that’s how! The total volume of water she displaces (including steel, people, parts, and air) must have less mass than that same volume of saltwater. Saltwater’s density is 1.025 g/mL, that’s more dense than freshwater, making it easier for you to float in the ocean. You might remember the Titanic sank when it hit an iceberg, ripping the hull and allowing water to enter and add more mass to the ship.
I recently was given a tour of Pisces hull space by the fabulous Engineering Department. They literally make everything run.
Safety is paramount
With ear plugs safely protecting my eardrums, we traveled down into the engine space. Safety is paramount. Fire stations can reach any point on the ship with 2 different hoses. There are 2 or 4 of everything – fire hoses, engines, generators, AC units, proportion motors, you name it – because EVERYTHING needs a backup. There are traditional CO2 fire extinguishers, but I’ve never been to a school that had a CO2 flooding system like the engine room has. Carbon-dioxide (CO2) breaks the oxygen side of the fire triangle by displacing oxygen in the combustion reaction, effectively stopping the reaction. If you were taught to “stop, drop, and roll,” you learned another way to smother the fire. The CO2 flooding system is so powerful that it cannot be used without doing a full body count of the people onboard to make sure no one is in the engine room.
Engineers Eric (left) and Travis (right) show Dorothy how water, electricity, and power are provided
Our first stop was the water maker unit. The water needed for cooking, bathing, and drinking can be distilled from ocean water or processed through reverse osmosis. Both options are available on Pisces. Past the expansion tanks and power distribution units Engineer Eric pointed out the refrigeration system for our Chemistry lab above. We freeze chlorophyll samples taken in one of our CTD projects in an ultra low freezer maintained at -75oC. I was looking at the equipment that was making the freezer work. Air compressors, generators, and motors make the 600-volt electricity on board, step it down to 480 volts for the major machinery, and down even farther to 110 volts for the outlet in my stateroom to charge my cellphone.
We continued inspecting the machinery that runs Pisces and enables our teams to fulfil our mission. Another piece of equipment that resembles an instrument from our chemistry lab is the centrifuge. It is used to purify the diesel fuel. These pull out the heavier impurities and store water, the lightest part of the mixture, underneath. You might have seen centrifuges at work in the dairy industry. Understanding the science of the engine room helps the science outside the engine room work even better!
Schematic (bottom left) of the 2 generators and 2 propulsion motors (down walkway on right). Water maker unit (top left) and refrigeration system (middle left) .
More information on Pisces: The ship is 206 feet long, is capable of trawling up to 6,000 feet, and can lift 8,000 pounds. She also has a “quiet hull” which helps reduce underwater sound. Maybe that’s why the whales and dolphins get so close?!
You do the Math: If each of the engine’s cylinders displacement is 51 liters, and it has 12 cylinders, what is the total displacement of the engine? Compare this with a car engine which holds 2-3 liters. Check in the next blog post for the answer.
To increase the speed of the ship requires an increase in power, but this is not a directly proportional relationship. Doubling the speed requires the power to be cubed. Engineer Eric described the importance of understanding fuel use on ships, math is money! Large container ships easily spend $300,000 a day on fuel. Saving 1% translates to $30,000 savings.
Styrofoam science experiment…. submerged 500 meters…. inverse relationship between pressure and volume predicts the air pockets in the styrofoam will decrease when the pressure is increased. What do you think will happen?
Interesting Things: I am surprised by the ways I have been prepared for life on a boat by classroom life in a public school. At West Johnston High School, in Benson, NC, we have fire drills at least once a month. On a boat, we have safety drills at least once a week. The horn blows a series of long and/or short blasts to let us know if there is a fire, a “MAN OVERBOARD”, or if we need to “ABANDON SHIP!”
Everyone must get into their Gumby suit in less than a minute during an emergency fire drill. The FRB (Fast Reserve Boat) practices the man overboard rescue!
Career Spotlight: Meet NOAA Ship Pisces’ new CO! Commander Sinquefield.
Did you know there was a Change of Command last month? Our new CO brings a wealth of knowledge and a desire to be a good leader. He showed me around the bridge this week and shared some of his background (BTW, the view on the bridge is amazing!). CDR Sinquefield’s command philosophy is to respect yourself, respect your shipmates, and respect your ship. Likewise, take care of yourself, take care of your shipmates, and take care of your ship. He believes in personal communication and fresh air.
The things he likes about being CO? He likes seeing things you just can’t see on shore, the continuity of historical traditions (like the language, for instance the word “starboard,” has had meaning for 1000 years), training, the opportunity to put into action leadership skills that he was taught and learned through leaders he admired, and regulations. OK, regulations might be pushing it, but he did say he had great respect for the loss of life that has prompted many of the regulations in the shipping industry today.
Growing up in Mississippi, he joined the Coast Guard to complete the trifecta of working in cotton fields, chicken plants, and river tugboats. CDR Sinquefield worked on three different ships while in the Coast Guard, hauled more 80-lb batteries up Alaskan mountains to replenish navigation lights than he’d care to remember, and became familiar with NOAA projects that informed fisheries reports on the west coast. He left the Coast Guard as ship assignments became highly competitive as the service was taking older ships offline at a greater rate then they were being replaced. He left the USCG and he joined NOAA as a civilian, later joining NOAA’s uniformed service, the NOAA Corps.
CO teaches the teacher about maps available for navigation. ENS Howsman (top right) stands watch on the bridge. The center of the circular device (bottom right) spins so fast during cold weather it keeps the area ice free.
CDR Sinquefield was able to earn his commercial shipping license, but doesn’t plan on driving a Mississippi tug boat anytime soon. He stands firm with NOAA’s of 10,000 people, 7 line offices, 15 research and survey ships, and 10 specialized environmental data collecting aircraft. The extraordinary mammals – we’re talking seals and blue whales here – affirm his career choice every. single. day.
Personal Log
Life on is very different from life on land. We work 12-hour shifts. Everyone gets to walk to work – I take 53 steps (10 of them are down 1 staircase) from my cabin door to the door of the dry lab. I take 19 steps to the mess hall for lunch and dinner. There are 67 steps (up 3 staircases) from my door to the Flying Bridge where I see gulls, Mola mola, a full view of the sun in the day, and a sky load of stars at night. I am there now, working on this Blog post when I am not distracted by nature.
One thing that is the same on a boat is the need to wash clothes (probably more frequently since everything had to fit in a carry-on bag and I needed that fleece sleeping bag just in case!). Here is a picture of the laundry room. The ship has 3 washers, 3 dryers, and all the detergent you need.
Dorothy checks out the washer and dryer on board. Detergent is provided. The most important rule when using is to clean out the dryer lint trap before AND after using. Extra Credit if you can tell me why!
Today is the eve of my debarkation (exit from NOAA Ship Gordon Gunter). Our estimated time of arrival (ETA) to Pier 2 at the Naval Station Newport is 10 a.m. tomorrow, June 7th. Before I disembark, the sea apparently wants to me remind me of its size and force. Gordon Gunter has been rocked back and forth by the powerful waves that built to around 5 feet overnight. Nonetheless, it is full steam ahead to finish collecting samples from the remaining oceanography stations. All hands on deck, as the saying goes. The navigational team steer the vessel, engineers busy themselves in the engine room, deck hands keep constant watch, scientists plan for the final stations, and the stewards continue to provide the most delicious meals ever. I am determined to not let a bumpy ship ride affect my appetite. It is my last full day aboard Gordon Gunter, and I plan to enjoy every sight, sound, and bite.
I am concluding my log on board NOAA Ship Gordon Gunter, in port. It seems fitting that my blog finish where it took life 10 days ago. When I first set foot on the gangway a week and a half ago, I had no idea of the adventure that lay in front of me. I have had so many new experiences during the Spring Ecosystem Monitoring (EcoMon) Survey—from sailing the Gulf of Maine to collecting plankton samples, along with many special events in between.
I won’t keep the experience and the memories just for myself either. Back home at Simpson Elementary School, 670 eager 1st, 2nd, and 3rd graders are waiting to experience oceanography and life at sea vicariously through their librarian. Through the knowledge I have gained about the EcoMon Survey, my blog, photographs, and videos, I am prepared to steer my students toward an understanding and appreciation of the work that is being done by NOAA. Gordon Gunter steered us in the right direction throughout the entire mission, and I plan to do the same for students in my library media center.
Many types of zooplankton and phytoplankton are microscopic, unable to be seen by the naked eye. From 300 plus meters out, birds can appear to be specks blowing in the wind. But with a microscope and a pair of binoculars, we can see ocean life much more clearly. The organisms seem to grow in size when viewed through the lenses of these magnification devices. From the smallest fish larvae to the largest Blue Whale, the ocean is home to millions of species. All the data collected during the EcoMon Survey (plankton samples, wildlife observers, ship’s log of weather conditions, and GPS coordinates) creates a bigger picture of the ocean’s ecosystem. None of the data aboard Gordon Gunter is used in isolation. Science is interconnected amongst several variables.
My answer would be that we need to do these ecosystem monitoring surveys because we are on the front lines of observing and documenting first hand what’s going on in our coastal and offshore waters. The science staff, aided by the ship’s command and crew, is working 24 / 7 to document as much as they can about the water conditions, not just on the surface but down to 500 meters, by measuring light, chlorophyll, and oxygen levels as well as nutrients available. Water column temperatures and salinities are profiled and Dissolved Inorganic Carbon (DIC) levels are checked as a way of measuring seawater acidity at the surface, mid-water and bottom depths. What planktonic organisms are present? Plankton tows across the continental shelf down to 200 meters are made to collect them. What large marine organisms such as whales, turtles and seabirds are present in different areas and at different times of the year, and are they different from one year to the next? From one decade to the next? Two seabird observers work throughout the daylight hours to document and photograph large marine organisms encountered along our cruise track. Without this information being gathered on a regular basis and in a consistent manner over a long period of time, we would have no way of knowing if things are changing at all. [
Just as the ocean changes, so does the science aboard the ship. So, what’s next for Gordon Gunter? Three days after my debarkation from the vessel, Gunter will be employed on an exploratory survey of Bluefin Tuna. This is quite an iconic survey since scientists could be on the brink of a new discovery. Bluefin Tuna were once thought to only spawn in the Gulf of Mexico and the Mediterranean Sea. That is until researchers began to find Bluefin Tuna larvae in the deep waters between the Gulf Stream and the northeast United States. Fifty years ago fishermen believed Bluefin Tuna were indeed spawning in this part of the Gulf Stream, but it was never thoroughly researched. The next survey aboard Gordon Gunter (June 10-24) will collect zooplankton samples which scientists predict will contain Bluefin Tuna larvae. The North Gulf Stream is not an area regularly surveyed for Bluefin Tuna. It is quite exciting. The data will tell scientists about the life history and genetics of these high-profile fish. NOAA Ship Gordon Gunter has executed countless science missions, each special in its own right. Yes, it is time for me to say farewell to Gordon Gunter, but another group of researchers won’t be far behind to await their turn to come aboard.
