John Kemp and Nico Llanos, mooring operation engineers, work on a Conductivity, Temperature, Depth sensor (CTD) in support of the Nansen and Amundsen Basins Observational System (NABOS) aboard the U.S Coast Guard Cutter Healy (WAGB 20) in the Arctic Ocean Sept. 1, 2023. The ship will deploy and recover the CTD 48 times in support of the NABOS. (U.S. Air Force photo by Airman 1st Class Norman D. Enriquez)