| Navy | The Royal Navy |
| Type | Submarine |
| Class | S |
| Pennant | P 263 |
| Built by | Cammell Laird Shipyard (Birkenhead, U.K.) |
| Ordered | 17 Nov 1942 |
| Laid down | 18 Aug 1943 |
| Launched | 2 Oct 1944 |
| Commissioned | 21 Dec 1944 |
| End service | |
| Loss position | |
| History | Sold to the Portugese Navy in August 1948 being renamed Neptuno. |
Commands listed for HMS Spearhead (P 263)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | T/Lt. Roy Edmund Youngman, RNR | Oct 1944 | Oct 1945 ? |
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