| Navy | The Royal Navy |
| Type | Minesweeper |
| Class | Bangor |
| Pennant | J 123 |
| Mod | Reciprocating engined |
| Built by | Lobnitz & Co. Ltd. (Renfrew, Scotland) |
| Ordered | 9 Sep 1939 |
| Laid down | 15 Oct 1940 |
| Launched | 16 Jun 1941 |
| Commissioned | 19 Dec 1941 |
| End service | |
| History | Allocated to Fishery Protection services in 1946. |
Commands listed for HMS Seaham (J 123)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Lt. Robert Ernest Brett, RNR | 1 Nov 1941 | 17 Jan 1945 |
| 2 | T/A/Lt.Cdr. Desmond Roberts Hopking, DSC, RNVR | 17 Jan 1945 | 7 Dec 1945 |
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Notable events involving Seaham include:
12 Jul 1943
The Italian submarine Bronzo was captured off Syracuse, Sicily by the British minesweepers HMS Seaham (Lt.Cdr. R.E. Brett, RNR), HMS Boston (Lt. D.H.G. Coughlan, RNR), HMS Poole (Lt. W.L.G. Dutton, RNR) and HMS Cromarty (Lt.Cdr. C.G. Palmer, DSC, RNZNVR).
Bronzo was commissioned into the Royal Navy as HMS P 714. On 29 January 1944 she was transferred to the Free French as Narval.