| Navy | The Royal Navy |
| Type | Motor Torpedo Boat |
| Class | BPB 72 feet-type |
| Pennant | MTB 521 |
| Built by | British Power Boat (Hythe, England, U.K.) |
| Ordered | |
| Laid down | |
| Launched | |
| Commissioned | 1 Nov 1946 |
| End service | |
| History | Sold in October 1958 |
We don't have any commands listed for HMS MTB 521 (MTB 521)
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