| 1933 |
Built as H8 DERVISH for Hellyer Bros Ltd, Hull.
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| October 09 1935 |
Bought by Admiralty and converted into Gem class anti submarine vessel HMT PEARL. |
| 1936 | Employed on weapons trials at Gibraltar. Joined the 2nd A/S Flotilla at Malta.
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| October 1936 | Paid off and reduced to the Reserve. Laid up at Rosyth. |
| June 1939 | Commissioned and attached to HMS DEFIANCE at Devonport.
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| 1942 | Rescued 43 survivors from HMS PENYLAN off Start Point. |
| 1944 | Took part in Operation Neptune as an A/S escort attached to the US Forces, escorting landing craft from Salcombe to Utah Beach. |
| December 23 1944 | Rescued 59 Survivors from SS DUMFRIES off the Isle of Wight. |
| February 15 1945 | Paid off at Pembroke Dock. |
| April 09 1946 | bought by J Marr & Son Ltd, Hull from Admiralty for £14,500. Refitted for fishing and renamed WESTELLA (Replacing the trawler of the same name lost in the war). |
| June 25 1948 | sold to Pegasus Fishing Co for £67,000 |
| 1953 | Sold to Dinas Steam Trawling Co, Fleetwood. |
| May 30 1959 | Sold to J Marr & Son Ltd, Fleetwood. |
| 1959 | Sold to Van Heyghen Freres for scrap. |
| August 18 1959 | Arrived at Ghent for breaking. |