| Navy | The Royal Navy |
| Type | Sloop |
| Class | Banff |
| Pennant | Y 21 |
| Built by | Bethlehem Shipbuilding Corp. (Quincy, Massachusetts, U.S.A.) |
| Ordered | |
| Laid down | 23 May, 1928 |
| Launched | 11 Oct, 1928 |
| Commissioned | 12 May, 1941 |
| End service | 27 Mar, 1946 |
| Loss position | |
| History | Returned to the United States on 27 March 1946. Her recommissioning was cancelled and she was sold on 25 March 1948. Commanding Officers: Lt.Cdr. David Charles Kinloch, RN Lt.Cdr. Rider Stuart Abram, RN Lt.Cdr. Frederick Harold Thornton, DSC, RNR A/Lt.Cdr. Bernard Morland Skinner, RN |
| Former name | USCG Champlain |
| Noteable events involving Sennen include: 19 May, 1943 |
