USCGC Acushnet (WMEC-167) was a cutter of the United States Coast Guard, homeported in Ketchikan, Alaska. She was originally USS Shackle (ARS-9), a Diver-class rescue and salvage ship commissioned by the United States Navy for service in World War II. She was responsible for coming to the aid of stricken vessels and received three battle stars during World War II, before a long career with the Coast Guard. Acushnet patrolled the waters of the North Pacific and was the sole remaining World War II era ship on active duty in the US fleet upon her retirement in 2011.