USCGC Mendota was a Lake-class cutter belonging to the United States Coast Guard launched on 20 June 1928 and commissioned on 23 March 1929.

[1] After 12 years of service with the Coast Guard, she was transferred to the British Royal Navy as part of the Lend-Lease Act.

[2] On 22 December 1939, Sebago attempted to assist the 2,847 gross register tons (GRT) Greek steamship Aliakmon, which had grounded north of Wash Woods, Virginia.

[2] As part of the Lend-Lease Act she was transferred to the Royal Navy where she was renamed HMS Culver (Y87) and commissioned on 30 April 1941.

[3] On 31 October 1941, Culver picked up 25 people from the Dutch merchant vessel Bennekom which had been sunk by a torpedo from U-96.