| Navy | The Royal Navy |
| Type | ASW Trawler |
| Class | |
| Pennant | FY 306 |
| Built by | Cochrane & Sons Shipbuilders Ltd. (Selby, U.K.) |
| Ordered | |
| Laid down | |
| Launched | 20 Nov, 1937 |
| Commissioned | Aug, 1939 |
| End service | |
| Loss position | |
| History | Completed in March 1938. Taken over by the Admiralty in August 1939. Displacement: 431 tons. Returned to her owner in November 1945. |
| Noteable events involving Haarlem include: 19 Oct, 1941 |
