NOAA Teacher at Sea
Aboard NOAA Ship Oscar Elton Sette
March 17 – 28, 2014
Mission: Kona Area Integrated Ecosystems Assessment Project
Geographical area of cruise: Hawaiian Islands
Date: March 21, 2014
Weather Data from the Bridge at 14:00
Wind: 6 knots
Visibility: 10 nautical miles
Depth in fathoms: 2,275
Depth in feet: 13,650
Temperature: 25.1˚ Celsius
Science and Technology Log
The Sette crew frequently encourages me to explore the many operations that take place around the clock on the ship. I continue to meet new people who complete countless tasks that allow the Sette to operate smoothly and safely.
NOAA Corps officers operate the bridge. The bridge is the central command station for the ship. NOAA Corps officers consistently ensure that everyone and everything on board is safe. Officers alternate shifts to monitor all radios and radar twenty-four hours a day.
They use numerous instruments to determine the ship’s location. A magnetic compass, maps, dividers, triangles, radar, a steering wheel, and visual observation are just a few of the resources used to guarantee we are on course. According to the NOAA Corps officers, the traditional magnetic compass continues to serve as one of the most reliable tools for navigation.
Location and weather data are officially recorded in the deck log on an hourly basis. However, officers are keeping an eye on the radar, compasses, and weather conditions every moment of the day. On top of that, they are monitoring nearby marine life, boats, and potential hazards.
Marine Mammal Observation Off the Kona Coast
Ali Bayless, Our Marine Mammal Observation (MMO) Lead, has thus far organized three MMO trips out on one of the small boats. Dropping a small boat from the Sette is a task that involves excellent and efficient communication among at least a dozen crew members. The small boat is carefully dropped into the water. Boat operators and scientists then climb down a ladder in their hard hats and lifejackets to embark on their day trip. Today, I was fortunate to take part in one of these MMO expeditions. Two scientists, two boat operators, and I ventured away from the Sette for three hours in hopes of spotting and hearing marine mammals. Excitingly, we did indeed spot up to one hundred spotted dolphins and spinner dolphins.
If you look closely at the photos, you can see round spots on the dolphins. Our MMO lead believes these are cookie cutter shark bite marks. This is an indication that cookie cutter sharks live in this vicinity. Two of our scientists from the Monterey Bay Aquarium are hoping to return to the Monterey Bay Aquarium with live cookie cutter sharks for the aquarium’s educational exhibits. There is a good possibility that we will find these sharks in our trawl lines that will be dropped later this week.
Science Party Interview with Jessica Chen
University of Hawaii PhD student, Jessica Chen, is working the night shift in acoustics from 16:00 to 01:00 during this IEA cruise. She displays patience and a high level of knowledge when I stopped by to pester her around 20:00. During our conversation, Jessica stated that she is from Colorado and came to Hawaii for her graduate studies. She will complete her PhD in 2015. She is interested in learning more about marine mammal behavior through acoustic monitoring and analysis.
This is Jessica’s second IEA cruise. Jessica, Aimee, and Adrienne monitor our acoustic screens 24/7. In the photo above, Jessica points out the slanted line (slanting up) that represents the diel (daily) vertical migration of the micronekton. The micronekton migrate daily from around 400-500 meters up to approximately 100 meters from the surface. Many even migrate all the way to the surface. When the sun goes down, they come up. When the sun comes up, they start their journey back down to their 400-500 meter starting point. Micronekton consist of potentially billions of small organisms including larval fish, crustaceans, and jellyfish. Their behavior is not completely understood at this point, but they may be migrating at these very specific times to avoid predators.
When asked what Jessica’s long term goals are, she shares that she would like to increase personal and public knowledge of the animals in the ocean. This will allow us to better manage the ocean and protect the ocean. It is clear that Jessica truly enjoys her work and studies. She states that she especially appreciates the opportunities to see wildlife such as dolphins and whales.
Did You Know?
Cookie cutter sharks have extremely sharp teeth. Their round bite is quick and leaves a mark that resembles one that could have been made with a cookie cutter. Hence the name, cookie cutter shark.