U.S. Coast Guard Petty Officer 1st Class Casey Connors, and Petty Officer 1st Class Ryan Miller, Regional Dive Locker West divers, swim under the fast ice after an underwater advancement ceremony next to the Coast Guard Cutter Polar Star (WAGB 10) in McMurdo Sound, Antarctica, Jan. 7, 2024. The Polar Star is enroute to Antarctica in support of Operation Deep Freeze, a joint service, interagency support operation for the National Science Foundation, which manages the United States Antarctic Program. (U.S. Coast Guard photo by Petty Officer 2nd Class Corey Smith)