The crew of the Coast Guard Cutter Shackle (WYTL 65609) transits up the Penobscot River in Maine to break ice on Feb. 16, 2022. The Shackle is one of three 65' Icebreaking Tugs with the critical mission of keeping the Maine and New Hampshire waterways open during the harsh winter. (U.S. Coast Guard Photo by Petty Officer 2nd Class Ryan L. Noel)