A Conductivity, Temperature, Depth sensor (CTD) is lowered into to the Arctic Ocean from the U.S. Coast Guard Cutter Healy (WAGB 20), on Sept. 3, 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)