| Navy | The Royal Navy |
| Type | Minesweeper |
| Class | YMS |
| Pennant | J 826 |
| Built by | Ballard Marine Railway Co. (Seattle, Washington, U.S.A.) |
| Ordered | 11 Jun 1941 |
| Laid down | 12 Aug 1941 |
| Launched | 21 Mar 1942 |
| Commissioned | 22 Aug 1942 |
| End service | |
| Loss position | |
| History | Returned to the USN on 1 August 1947. |
| Former name | BYMS 26 |
Commands listed for HMS BYMS 2026 (J 826)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | T/Lt. Cyril Bewley, RNR | 4 Apr 1942 | early 1943 |
| 2 | R S Grieve, RNVR | early 1943 | 1 Jul 1944 |
| 3 | T/S.Lt. Sidney Harold Waldron, RNVR | 1 Jul 1944 | 1 Apr 1945 |
| 4 | T/A/S.Lt. Harold Edward Robson, RNVR | 1 Apr 1945 | 20 Aug 1945 |
| 5 | T/S.Lt. Sidney Harold Waldron, RNVR | 20 Aug 1945 | Jan 1946 |
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Noteable events involving BYMS 2026 include:
19 Jul 1950
Re-named "Calypso" and serving as a Maltese ferry, the former HMS J826 was purchased by French explorer Jacques-Yves Cousteau and converted into the famous research vessel of the same name.
http://www.newsfinder.org/site/more/jacques_yves_cousteaus_calypso/