| 1917 |
Built as Admiralty Castle JAMES ROBERTSON and fitted with listening hydrophones.
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| 1921 |
Sold to mercantile as CAPSTONE and acquired by Boston Deep Sea Fishing & Ice Co Ltd. |
| June 1940 | Requisitioned as CAPSTONE and converted to a minesweeper.
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| October 1945 | Returned to owners. |
| 1945 | To Fleetwood registration.
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| 1949 | Renamed WYRE CAPTAIN.
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| 1960 | Sold to BISCO and allocated to Thos W Ward.
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| September 15 1960 | Arrived at Barrow for breaking.
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