The crews of the Coast Guard Cutters Shackle (WYTL 65609) and Tackle (WYTL 65604) transit up the Penobscot River in Maine to break ice on Feb. 16, 2022. The 65-foot small harbor tugs are multi-mission cutters. Their primary missions are domestic ice breaking, port security, search and rescue, and law enforcement operations on rivers and inland areas. (U.S. Coast Guard Photo by Petty Officer 2nd Class Ryan L. Noel). 220216-G-IY621-1263