USCGC Champlain on the International Ice Patrol, circa mid-1930s.
History
United States
Name	USCGC Champlain (1929)
Namesake	Lake Champlain
Builder	Bethlehem Shipbuilding Corporation, Quincy, Mass.
Laid down	23 May 1928
Launched	11 October 1928
Commissioned	24 January 1929
Decommissioned	12 May 1941
Fate	Transferred to Royal Navy
United Kingdom
Name	HMS Sennen (Y21)
Commissioned	12 May 1941
Fate	Returned to USCG 27 March 1946
United States
Name	USCGC Champlain (WPG-319.)
Fate	Sold to Hughes Brothers, Inc. 25 March 1948
General characteristics
Class and type	Lake-class cutter (USCG) Banff-class sloop (RN)
Displacement	2,075 long tons (2,108 t)
Length	250 ft (76 m)
Beam	42 ft (13 m)
Draft	12 ft 11 in (3.94 m)
Propulsion	1 × General Electric turbine-driven 3,350 shp (2,500 kW) electric motor, 2 boilers
Speed	14.8 kn (27.4 km/h; 17.0 mph) cruising 17.5 kn (32.4 km/h; 20.1 mph) maximum
Complement	97
Armament	1 × 5 inch gun 1 × 3 inch gun 2 × 6-pounder (57 mm)

USCGC Champlain was a Lake-class cutter of 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.

Career

US Coast Guard – Champlain

After commissioning in January 1929, Champlain was homeported in Stapleton, New York.^[2]

Royal Navy – Sennen

As part of the Lend-Lease Act she was transferred to the Royal Navy where she was renamed HMS Sennen (Y21) and commissioned on 12 May 1941.^[3] On 19 May 1943, Sennen assisted HMS Jed in the sinking of U-954 by depth charges. At the end of the war, in March 1946, she was returned to the USCG.^[3]

US Coast Guard – Champlain (post-war)

Upon her return to the USCG, her original name was restored and she was given the hull number and designation WPG-319. She was then placed into reserve status until March 1948 when she was sold to Hughes Brothers, Inc. of New York.^[2]