USCGC Bittersweet (WLB 389) was a C or Iris-class 180-foot buoy tender of the United States Coast Guard.

Built by the Zenith Dredge Company of Duluth, Minnesota, the ship was laid down on 16 September 1943, and launched on 11 November 1943.

Based at Kodiak, she carried out numerous search and rescue operations, fought fires, delivered medical supplies, and enforced fishing laws.

In addition she took part in oil spill cleanup operations and also participated in the International Ice Patrol.

This was connected up to two Westinghouse generators which were driven by two CooperBessemer GND-8 four-cycle diesel engines.