| Navy | The Royal Navy |
| Type | Submarine |
| Class | S-1 |
| Pennant | P 556 |
| Built by | Bethlehem Steel Corp. (Quincy, Massachusetts, U.S.A.) |
| Ordered | |
| Laid down | 17 Apr 1919 |
| Launched | 9 Nov 1922 |
| Commissioned | 5 Jun 1942 |
| End service | Apr 1944 |
| Loss position | |
| History | USS S-29 was transferred to the Royal Navy at New London on 5 June 1942. She arrived at Gibraltar, via Bermuda, in August 1942 to refit, nominally as part of 8th Flotilla. She moved to Plymouth in February 1943, for anti-submarine training role. In November 1943 she moved to Portsmouth for service in the same role. She was damaged by a battery explosion on 27 January 1944, and was decommissioned into reserve in April. She was returned to the United states Navy on 26 January 1945. Sold for scrap to Messrs Pounds, Portsmouth on 24 January 1947. |
| Former name | S-29 |
Commands listed for HMS P 556 (P 556)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Lt. Stewart Armstrong Porter, RN | Apr 1942 | 22 Sep 1942 |
| 2 | Lt. Laurence Edward Herrick, RN | 22 Sep 1942 | 23 Nov 1942 |
| 3 | Lt. Frederick Melbourne Piggott, RNR | 23 Nov 1942 | 24 Feb 1943 |
| 4 | Lt. Arthur Connuch Halliday, RN | 24 Feb 1943 | 15 Mar 1943 |
| 5 | Lt.Cdr. Frederick Henry Sherwood, RCNVR | 15 Mar 1943 | 15 Jun 1943 |
| 6 | Lt. Rudland Dallas Cairns, RN | 15 Jun 1943 | 30 Aug 1943 |
| 7 | Lt. John Renwick Haig Haddow, DSC, RN | 30 Aug 1943 | Dec 1943 |
| 8 | Lt. John Leslie Watkinson, RN | 28 Dec 1943 |
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