physics – NOAA Teacher at Sea Blog

August 30, 2026August 30, 2026

Sabrina Whitaker: Hands on the Helm, August 28, 2026

NOAA Teacher at Sea

Sabrina Whitaker

Aboard NOAA Ship Thomas Jefferson

August 18 – 31, 2026

Mission: Hydrographic Survey, Leg 3

Geographic Area of Cruise: The Great Lakes

Date: August 28, 2026

Weather Data from the Bridge

Latitude: 43°22.5312’N

Longitude: 076°43.7097’

Winds: 5 knots SW

Temperature: 75 F

Science and Technology Log

Executive Officer Chris Duffy looking over the planned survey for the day

Executive Officer (XO) Chris Duffy greeted me as I climbed the stairs to the bridge with, “The best job on the boat!” and then promptly asked if I wanted to drive the ship. I asked for a tour of the bridge first. He pointed out the main engine and auxiliary engine and then spoke about how it was especially beneficial to use the auxiliary engine in tight spaces for a finer control of the ship. He also pointed out the ship’s communication system including two radios and then he showed me the two radars. There are two different radars and each works with a different frequency. One is a higher frequency (X-band with a frequency of about 10 GHz) and one is lower (S-band which is around 3 GHz). The X-band radar is used for collision avoidance and can even help identify some weather patterns like rain that is coming in. The S-band radar is used more to see bigger things like large ships further away or in bad weather. I was surprised by how easily the ship turned under my hand. I was only making adjustments of 5-15 degrees from the center of the ship and yet she turned around easily and quickly.

Then, he showed me the navigation system. It is possible to control the ship “in hand” and that means a person is controlling the ship’s motion instead of the computer. There is also an “auto” feature, which can set the ship on a heading and the ship will continue on that heading forever or until someone gives the ship’s computer another parameter. And finally, there is a different type of auto navigation, where the ship follows a predetermined path like if you could have your car follow a Google Maps route without having to touch the steering wheel. This setting is referred to as “nav nav” because you press the “nav” button twice. When this setting is used, the map is usually created by those down in survey because they have two programs running. One is seeing where the SONAR swath has been and they have the software that runs nav nav as well, which is also shown on the bridge.

Once I got familiar with the bridge, it was my turn. XO called out angles, “Right 15 degrees rudder” and I would follow his instructions, and then he would call out another angle, “Right 5 degrees rudder,” until we got the ship turned around so we could collect the next line of data with the multibeam.

I wasn’t really sure how the angles and the directions were being decided because I couldn’t picture it in my head. So, just like in my own classroom, XO pulled out a whiteboard and gave me a mini-lesson on what he was doing. I thought this would be a good chance to show his teaching in action, so the video of the impromptu lesson is below.

Personal Log

Having spent years working with the American Physical Society to recruit physics majors, I am always on the lookout for physics in the real world. National graduation numbers highlight a stark gap: in the 2024–2025 academic year, only about 8,100 students earned a bachelor’s degree in physics, compared to roughly 141,000 in engineering. Yet, physics graduates are essential for advancing fields like quantum computing, fusion energy, and artificial intelligence.

While I have loved seeing hands-on physics applied across the bridge, survey room, and engine room, I was especially thrilled to meet someone using their physics degree outside of academia: Operations Officer Mark Meadows.

Operations Officer Mark Meadows as he collects a sample from the bottom of the lake

Mark discovered NOAA while completing his undergraduate degree. After participating in a research cruise, he fell in love with life at sea and applied to the NOAA Commissioned Officer Corps. The Corps requires officers to hold a college degree with at least 48 semester hours in STEM coursework.

After completing basic officer training, Mark joined NOAA Ship Thomas Jefferson as a junior officer, mastering ship handling, watchstanding, and maritime operations. Now in his sixth year with NOAA, he serves as one of two Operations Officers on board, helping lead ship operations and troubleshoot complex challenges.

What Mark loves most is how seamlessly his role blends seamanship with active science. On any given day, NOAA Corps officers work side-by-side with the hydrographic survey team—deep in data acquisition, processing, and “sheet” management (how we break down survey areas)—while simultaneously steering the ship, running small boats, and leading maritime operations.

Another huge draw of the NOAA Corps is its unique career rotation: officers typically complete a two-year sea assignment followed by a three-year shore assignment. This cycle gives them hands-on experience across the entire agency, allowing them to bring real-world operational insight into land-based research, policy, and management roles before heading back to sea.

Did You Know?

The hydrographic survey crew frequently detects shipwrecks in their multibeam SONAR data. We recently mapped one during our run:

While raw SONAR images can take a moment to interpret, comparing the structural outlines to a ship’s internal frame brings the target into focus. As processing continues, the survey team will clean up the imagery and all the detailed information (location, depth, dimensions of the wreck, imagery, etc.) is packaged up and sent to the State Historical Preservation Office (SHPO). They will then assess whether the wrecks have historical significance.

August 20, 2026August 20, 2026

Sabrina Whitaker: Perfectly Imperfect, August 18, 2026

NOAA Teacher at Sea

Sabrina Whitaker

Aboard NOAA Ship Thomas Jefferson

August 18-31, 2026

Mission: Hydrographic Survey, Leg 3

Geographic Area of Cruise: Lake Ontario

Date: August 18, 2026

Weather Data from the Bridge

Latitude: 43°51.0527′ N

Longitude: 76°29.1419′ W

Winds: SW at 14 knots

Air Temperature: 74°F

Science and Technology Log

Today was jam-packed with preparation, community, and reflection. I was struck not only by how meticulously everyone prepares for emergencies, but also by the crew’s thoughtful debriefs. They continuously strive for operational perfection, yet never at the expense of appreciating a job well done.

We began the morning with shipboard safety briefings. At sea, addressing a fire quickly is paramount. Everyone has a designated duty and muster station. On land, the standard advice for a building fire is to evacuate immediately—even if it’s small. However, as the Executive Officer (XO) and crew emphasized, if you spot a small fire aboard ship, the best immediate action is to grab an extinguisher and put it out. The reason for this stark difference is simple: on open water, help is miles away. An uncontrolled fire endangers the entire vessel, forcing an abandon-ship scenario that carries far greater risk than tackling a localized flame right away.

There were two new members of the crew besides me. They were assigned to firefighter roles and we went through the process of getting them gear and setting it up so that they could just hop into it if they needed to use it.

two men stand in an interior room of the ship wearing khaki firefighting jackets and pants and protection for their hands. they smile for a photo. hard hats and life jackets are stored on the wall behind them. — New crewmembers trying on firefighting gear

Should the call to abandon ship ever be given, comprehensive protocols are already in place. Everyone gathers their immersion suits and proceeds to the lifeboats. Each lifeboat holds up to 20 people. With roughly 30 personnel currently aboard the Thomas Jefferson and several lifeboats available, there is more than enough capacity for everyone.

From safety drills, we transitioned to the Leg Operations Brief, led by Operations Officer Mark Meadows. This meeting serves a dual purpose: preparing for the upcoming leg while reflecting on the previous one. Because personnel rotate frequently—some staying for multiple legs, others returning home or arriving from across the country—a structured presentation ensures a seamless transition. The team openly analyzes both the strengths and challenges of the prior leg to set up the incoming crew for success.

Next was a technical discussion on Pulse Per Second (PPS), a concept directly applicable to the data-collection software used on board. Operations Officer Meadows provided a thorough explanation, highlighting why understanding the mechanics behind our equipment (and its software) is crucial for real-time operational adjustments.

NOAA Corps officers, wearing their standard blue uniforms, in conversation in a room filled with computer monitors. OPS Meadows may be the one standing in the middle pointing to screen. — Operations Officer Meadows presenting on the previous leg of the mission

The software generates a pulse display similar to the diagram below:

photo of a visual output display from an older instrument. it features a graph of volts versus time, with a yellow line pulsing vertically up, over, and then back down. — Example of a 1 pulse per second signal generated by a GPS receiver. Photo from Codrey Electronics.

The time from the leading edge of one pulse to the leading edge of the next is exactly 1 second. Meanwhile, the duration between the leading edge and the trailing edge of a single pulse is approximately 1 millisecond (ms). This subtle nuance means it is remarkably easy for data collection to end up off by a millisecond. In many contexts, that tiny margin is negligible; in high-precision hydrography, it matters. Recognizing how the software handles these signals allows the team to correct data post-collection if needed. It reminded me of a favorite lesson from my own high school physics teacher: Always understand how your equipment works so you know how to troubleshoot it when it doesn’t.

After the briefings wrapped up, it was time to get underway! This was the moment my physics-teacher heart sang. It’s rare to see a fundamental physics concept demonstrated so dynamically in real life.

view from an upper deck of NOAA Ship Thomas Jefferson as the ship carefully pulls away from the dock at the Port of Oswego; we see a concrete road along the shore here, and port buildings, and a smaller boat docked farther down. — The separation from the dock and part of the maneuvering into open water

photo of screens on the bridge of NOAA Ship Thomas Jefferson displaying electronic nautical charts. we can see the blue water of Lake Ontario out the windows behind the display. — The course *Thomas Jefferson* plotted after maneuvering away from the pier

The deck crew expertly maneuvered the ship away from the dock, accounting for wind force, current, and the thrust vectors of the ship’s engines. It was a beautiful, real-world ballet of vector addition—one that my students would be relieved they didn’t have to calculate on paper! The crew handled the separation from the dock and navigation around the pier with effortless precision.

four NOAA corps officers in blue uniforms stand around the controls and displays on the bridge of NOAA Ship Thomas Jefferson. another crewmember, not a NOAA Corps Officer, is visible in the background. — Deck crew of NOAA Ship *Thomas Jefferson* as they maneuver the ship out from port

Once we reached open water, the crew gathered for what the XO fondly called “Story Time”—a post-maneuver debrief. Once again, they analyzed what went smoothly and what could be refined. They praised the steady speed and smooth handling, while constructively noting that higher communication volume over the radio would make it easier for everyone to follow along. Both praise and critique were taken to heart. Because the Thomas Jefferson will be navigating this same harbor all season, the pursuit of perfection is an ongoing goal—but everyone acknowledged that the crew’s skill today was exceptional.

Personal Log

Trying on the immersion suit was pretty hilarious. I unrolled it in my stateroom and then I had to read the directions. Are you supposed to keep your shoes on? Yes, and luckily, it says so on the instructions on the outside of the packaging. I was able to get into it ok, and then I kind of flopped upstairs so I could get help with getting a picture. I also realized that in a real emergency, I will need some help zipping it up because the zipper is very hard to slide. I’ll have to practice that some more. The worst part though, was taking it off and then rolling it up and putting it back into its bag. I’m not going to lie, that part was a little rough.

Sabrina tries on a bright red and yellow survival suit and gives two thumbs up with the comically large 3-fingered gloves. she stands inside the ship in a desk area. — TAS Sabrina Whitaker tries on a survival suit

Did You Know?

The Great Lakes are technically considered non-tidal.

Ocean tides (true tides) are generated by the gravitational pull of the moon and sun. While the Great Lakes do experience a spring tide during a new or full moon, the water level changes by only about 2 inches (5 cm)—compared to 5 to 7.5 feet in places like the Long Island Sound. Because these lake tides are so minor, they are masked by greater local weather forces and categorized as non-tidal.

However, the Great Lakes experience short-term water level fluctuations that closely mimic ocean tides. These are called seiches (pronounced sayshes)—standing waves that oscillate back and forth within an enclosed or semi-enclosed body of water.

Unlike tides driven by gravity, seiches are driven by strong winds and rapid changes in atmospheric pressure that literally push water from one end of the lake to the other. Lake Erie is famous for dramatic seiches, but all the Great Lakes experience them. In fact, in 1954, the extreme winds of Hurricane Hazel piled up so much water near Toronto that it triggered a massive seiche on the opposite shore of Lake Ontario!

August 12, 2026August 12, 2026

Sabrina Whitaker: A Traveling Scientist, August 9, 2026

NOAA Teacher at Sea

Sabrina Whitaker

Aboard NOAA Ship Thomas Jefferson

August 18 – 31, 2026

Mission: Hydrographic Survey, Leg 3

Geographic Area of Cruise: Lake Ontario

Date: August 9, 2026

Weather Data from Granger, Indiana

Latitude: 41.7533° N

Longitude: -86.1108° W

Winds: South at 6 mph

Air Temperature: 83 °F

Science and Technology Log

“I spawned a wither!” and, “That is the weirdest world that has ever existed!” my twins yelled to each other from across my parents’ living room while they played Minecraft and I typed this post. I’m Sabrina (Sara) Whitaker, and in about a week, my view will change from the rain soaked prairie of Northern Indiana where my parents live to the waterfront of Lake Ontario where I will begin my journey aboard NOAA Ship Thomas Jefferson as I continue the third leg of a hydrographic survey of Lake Ontario.

Our mission out on the water is a hydrographic survey—essentially mapping what lies beneath the surface. By charting depths, shorelines, and hidden underwater terrain, we will create the accurate maps ships need to navigate safely and keep our coastal waterways protected. Over the next two weeks, I will be learning the details that allow scientists to discover these secrets, and I hope you will join me as we do so.

Personal Log

While my parents live in Indiana and I lived part of my childhood here, I now live on Long Island and teach physics in Farmingdale, New York. The story of how I went from living in Indiana to ending up on Long Island is long and varied, but it closely follows my path toward becoming a physics teacher and leads directly to my newest adventure aboard NOAA Ship Thomas Jefferson.

During this summer’s trip to Indiana, I got to visit my undergraduate physics advisor, Dr. Henry Scott, at Indiana University South Bend, where my physics journey continued after high school.

portrait photo of Sabrina and Dr. Scott; in the background, we can see a bridge over a tree-lined river — Sabrina and Dr. Henry Scott on the banks of the St. Joseph River during a visit to Northern Indiana, 2026

Under the mentorship of Dr. Scott and later Dr. Wendy Panero at The Ohio State University, I studied high-pressure mineral physics and conducted experiments at the synchrotrons at Argonne National Laboratory in Illinois and Brookhaven National Laboratory in New York. That foundation led to an incredible opportunity in Japan, where I worked with scientists at Ehime University’s Geophysical Research Center editing their scientific research papers.

two women pose for a photo in front of a beautiful display of flowers — Sabrina and a friend at the Chrysanthemum Festival in Matsuyama, Japan 2010

When my oldest daughter, husband, and I returned to the United States, I continued editing scientific papers, but I eventually decided to bring that love of science, travel, and global community into the classroom. To make the shift from researcher to educator, I attended Stony Brook University to gain the skills that would help me translate those experiences into inspiration for my students.

This upcoming voyage on Thomas Jefferson combines everything I love: science, travel, and finding fresh ways to engage my students. For two weeks, I’ll get hands-on experience in a branch of science I’ve never practiced, learning straight from NOAA scientists and bringing those lessons back to my classroom. I expect to make mistakes, learn from them, and have a lot of fun along the way. It’s going to be a great challenge, and I can’t wait to begin.

Did You Know?

NOAA Ship Thomas Jefferson

NOAA Ship Thomas Jefferson (credit: NOAA)

For this assignment, I will be living and working aboard Thomas Jefferson, a 208-foot hydrographic survey vessel.

Capable of traveling nearly 19,200 nautical miles and staying at sea for up to 45 days, the ship functions as a mobile lab. Its primary job is mapping the seafloor and lake beds to collect data for updating nautical charts.

May 13, 2022July 17, 2022

George Hademenos: I am (George Hademenos, NOAA Teacher at Sea), I Said, May 13, 2022

NOAA Teacher at Sea

George Hademenos

Aboard NOAA Ship Oregon II

June 20 – July 3, 2022

Mission: SEAMAP Summer Groundfish Survey

Geographic Area of Cruise: Gulf of Mexico

Date: May 13, 2022

Welcome to my blog!

Welcome to the inaugural post of my blog, describing my observations and reflections as a NOAA Teacher at Sea on my upcoming expedition in June 2022. My name is George Hademenos and I am excited to invite you along on this field trip of a lifetime to learn about marine science and the research that will be conducted during the research cruise. This is a particularly momentous occasion as this experience has been two years in the making (Dang that COVID!) – more on the application process, the NOAA Teacher at Sea program, and the instructional possibilities that this program presents will follow in upcoming posts.

Before I go any further, I want to take this opportunity to address the 800-lb sea lion in the room. The “sea lion” I am referring to is the title of the blog. “I am (George Hademenos, NOAA Teacher at Sea), I Said.” is a rather peculiar title for a blog entry and I did want to take this opportunity to explain the rationale for this title and set the stage for the blog entries to follow.

I have always loved music not only for the melodies but also for the lyrics that draw the listener into a story. Music has played an important part of my life not only as a hobby but also as a job. Beginning in high school and continuing through college, I was an announcer at radio stations in my hometown of San Angelo, Texas, the West Texas city that I grew up in. My love of music combined with my love of talking (which greatly prepared me for the classroom) made this an ideal job for me. Below is a picture of me at one of these radio stations that I worked at, KGKL.

A close-up view of high-school-aged George sitting at a microphone, wearing headphones — My job through high school and college was a radio announcer.

In any event, returning to the blog title discussion, I decided to incorporate this time in my life into my current experience by titling this blog entry (as well as every other blog title that follows) with the exact title (or a modified title) of a recorded song. What better way to begin a blog than with Neil Diamond!

Introducing…me!

With that explanation out of the way, I would like to use this first blog entry to introduce myself, explain why a high school physics teacher in Texas is interested in marine science and, most importantly, provide details about my cruise assignment as well as ways you can learn more about my expedition and marine science, in general. I am currently in my 21^st year of teaching physics at Richardson High School in Richardson, Texas, a suburb north of Dallas.

A screenshot of the homepage of Richardson High School's website — Welcome to Richardson High School, my classroom home for 21 years!

I know that physics often gets a bad reputation among high school students as being hard, involving math, and quite frankly a class that they are forced to take. And these students would be correct on all counts. However, I often tell my classes at the beginning of each school year, “the reason I love teaching physics is that each of you experience physics on a daily basis and I do not have to think long and hard to come up with examples and applications of every topic and concept covered in class that directly impact your life.” I know that if I am successful in this regard, then perhaps my students might actually grow to tolerate and some maybe to even enjoy physics.

How did I end up in the classroom?

When I graduated from high school, I didn’t know what I wanted to be but I knew what I didn’t want to be… a teacher. I did not want or even entertain the notion of a career as a teacher. What makes this even more astounding is that everyone in my family were teachers, except me. My dad was the Education Department chair at the university I attended but I still was not interested. I wanted to pursue a career in medical research. Following my pursuit of advanced degrees in physics, two postdoctoral fellowships (one in nuclear medicine and another in neuroradiology), and a career as a staff scientist for stroke at the American Heart Association, I lived my dream but realized it was impacting my reality. My wife, Kelly, and I have a daughter, Alexandra, who always loved school and invested her time in any and all extracurricular activities she could possibly handle. My time was invested in activities that required my direct attention such as meetings, conferences, grants and drafting manuscripts for publication and not activities that I wanted to focus on such as attending recitals, performances, parent-teacher conferences and help with homework.

I understand that there are priorities in life and for me, they finally came into focus. I decided to change careers – change into the one career I thought I would never pursue – teaching. Twenty years later, I still have not regretted the move. So, what am I like in the classroom? The video below gives you a snapshot of what it is like to have me as a teacher.

A video summary of me as a classroom teacher.

Why marine science?

One thing you will come to learn about me through my blog postings is that I am a teacher who not only loves to teach but also, first and foremost, loves to learn. I am always looking for novel, innovative, and creative approaches to instructional activities, experiences, and projects that I can engage my students with, as well as share these approaches with other teachers. When a program such as NOAA Teacher at Sea comes about with opportunities for teachers to learn about marine science and “walk a mile in the shoes” of researchers, teachers like me jump at the chance to apply and hopefully are selected for such an honor.

I will be a participant on NOAAS Oregon II for Leg 2 of the SEAMAP Summer Groundfish Survey where I will be working with and learning from Andre J. Debose, Chief Scientist with NOAA Fisheries Service and his research team based in Pascagoula, MS. I am beyond ready for my Teacher at Sea cruise where I plan to pursue the following two objectives: (1) to share my knowledge and experiences of this journey with you through a blog and a Google Site and (2) initiate and contribute to a dialogue about the importance of planning, collecting, and evaluating surveys of shrimp, groundfish, plankton, and reef fish, conducted in the Gulf of Mexico, that you in turn can share with your students and colleagues.

More information regarding the cruise will follow in subsequent blog posts prior to and during the cruise (if the internet is behaving). I hope that you will not only read the blog posts but ask questions ranging from the Teacher at Sea program to the cruise details to the ship NOAAS Oregon II to the research conducted aboard the vessel to ways you can learn more marine science (or if you are a teacher, to design instructional activities to engage your students in marine science). I may not know the answers to all of your questions but rest assured that, if I do not know how to respond to a particular question, I will let you know and take steps to find a prompt and factual response. I would like to make this journey a positive learning experience for everyone!