U.S. Coast Guard Petty Officer 2nd Class Tyler Scott, a student in the Cold Water Ice Diving (CWID) course, gives the OK signal as he surfaces from the water tank at the Minnesota School of Diving, Minnesota, Feb. 1, 2022. The CWID course trains and prepares military divers for diving operations in high-latitude environments. (U.S. Coast Guard photo by Petty Officer 3rd Class Jessica Fontenette)