| Navy | The Royal Navy |
| Type | Submarine |
| Class | S |
| Pennant | P 216 |
| Built by | Cammell Laird Shipyard (Birkenhead, U.K.) |
| Ordered | 4 Apr 1940 |
| Laid down | 31 Dec 1940 |
| Launched | 11 Jun 1942 |
| Commissioned | 24 Sep 1942 |
| End service | |
| Loss position | |
| History | Sold to be broken up for scrap on 24 December 1947. Scrapped at Troon, Scotland in August 1948. |
| Former name | P 66 |
Commands listed for HMS Seadog (P 216)
Please note that we're still working on this section.
| Commander | From | To | ||
| 1 | Lt. Anthony Robert Daniell, DSC, RN | Aug 1942 | 4 Dec 1942 | |
| 2 | Lt. Desmond Samuel Royce Martin, RN | 4 Dec 1942 | 15 Mar 1943 | |
| 3 | Lt. Clifford Raymond Pelly, RN | 15 Mar 1943 | ??? | |
| 4 | Lt. Samuel Stanley Brooks, DSC, RN | ??? | 30 Aug 1944 | |
| 5 | Lt. Edward Ashley Hobson, DSC, RN | 30 Aug 1944 | Oct 1945 ? | |
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Noteable events involving Seadog include:
28 Dec 1943
HMS Seadog (Lt. C.R. Pelly, RN) torpedoes and sinks the German transport ship Oldenburg (8537 GRT) about 2.5 nautical miles east-north-east of Honningsvåg, Selje, Norway in position 62º13'N, 05º08'E. (see map)
27 Feb 1945
On 27 February 1945 HMS Seadog (Lt. E.A. Hobson, RN) rescued three US airmen from a raft in the Bay of Bengal. Shortly afterwards Seadog rescued another. Later Seadog rendezvoused with RAF Catalina to transfer these survivors.
18 May 1945
HMS Seadog (Lt. E.A. Hobson, RN) torpedoes and sinks a Japanese coaster north of Sumatra, Netherlands East Indies.
20 May 1945
HMS Seadog (Lt. E.H. Hobson, RN) sinks a Japanese sailing vessel with gunfire north of Sumatra, Netherlands East Indies.
24 Jul 1945
HMS Seadog (Lt. E.A. Hobson, RN) sinks a Japanese sailing vessel with gunfire in the Strait of Malacca.
26 Jul 1945
HMS Seadog (Lt. E.A. Hobson, RN) sinks a Japanese sailing vessel with demolition charges in the Strait of Malacca.
27 Jul 1945
HMS Seadog (Lt. E.A. Hobson, RN) sinks a Japanese sailing vessel with gunfire in the Strait of Malacca.
29 Jul 1945
HMS Seadog (Lt. E.A. Hobson, RN) sinks a Japanese sailing vessel with demolition charges in the Strait of Malacca.
2 Aug 1945
While operating together HMS Seadog (Lt. E.A. Hobson, RN) and HMS Shalimar (Lt.Cdr. W.G. Meeke, DSC, RN) sink a Japanese tug and a barge with gunfire in the southern part of the Strait of Malacca.
5 Aug 1945
While operating together HMS Seadog (Lt. E.A. Hobson, RN) and HMS Shalimar (Lt.Cdr. W.G. Meeke, DSC, RN) sink a Japanese coaster with gunfire in the southern part of the Strait of Malacca.
Also on the same day Seadog sinks a Japanese sailing vessel with demolition charges.