USCGC Unimak (WAVP-379), later WHEC-379, WTR-379, and again WHEC-379, was a United States Coast Guard Casco-class cutter in commission from 1949 to 1975 and from 1977 to 1988. Her radio callsign was NBVG.
Unimak was homeported in Boston, Massachusetts, from 3 January 1949 to 1 September 1956. Her primary duty during her Coast Guard service was to serve on ocean stations to gather meteorological data. While on duty in one of these stations, she was required to patrol a 210-square-mile (544-square-kilometer) area for three weeks at a time, leaving the area only when physically relieved by another Coast Guard cutter or in the case of a dire emergency. While on station, she acted as an aircraft check point at the point of no return, a relay point for messages from ships and aircraft, as a source of the latest weather information for passing aircraft, as a floating oceanographic laboratory, and as a search-and-rescue ship for downed aircraft and vessels in distress, and engaged in law enforcement operations.
On 22 August 1977, Unimak was reactivated, again redesignated WHEC-379. She was home-ported at New Bedford, Massachusetts, for the rest of her Coast Guard career. During this stint in commission, she was used primarily for fisheries patrol.
Unimak also interdicted the trafficking of illegal drugs. On 6 October 1980, she seized the merchant ship Janeth 340 nautical miles (630 kilometers) southeast of Miami, Florida, carrying 500 bales of marijuana. On 14 October 1980, she seized the pleasure craft Rescue carrying approximately 500 bales of marijuana and the pleasure craft Snail with two tons of marijuana on board in the Gulf of Mexico. On 17 October 1980, she seized the merchant vessel Amalaka southwest of Key West, Florida, carrying 1,000 bales of marijuana. On 19 October 1980, she seized the fishing vessel Wright's Pride southwest of Key West, carrying 30 tons of marijuana. In March 1981, while on an Officer Candidate School training cruise, she intercepted the merchant ship Mayo with 40 tons of marijuana on board.