Coast Guardsmen aboard the U.S. Coast Guard Cutter Healy (WAGB 20) wait for the conductivity, temperature, depth sensor (CTD) to return from taking reading, in the Arctic Ocean, on Sept. 10, 2023. The ship will deploy and recover the CTD 48 times in support of the Nansen and Amundsen Basins Observational System (NABOS). (U.S. Air Force photo by Airman 1st Class Norman D. Enriquez)