U.S. Coast Guard Chief Petty Officer Christopher Tull [left] inspects the holes in the dive site before students make their cuts on Lake Ferrell, Minn., Feb. 2, 2022. The dive hole is created by drilling holes in the ice with augers, cutting a line between the holes, and lifting the ice out in chunks. (U.S. Coast Guard Photo by Petty Officer 3rd Class Gregory Schell)