| July 19 1913 |
Launched by Cook, Welton & Gemmell Ltd, Beverley (Yd.No.269A) for Great Grimsby & East Coast Steam Fishing Co Ltd, Grimsby as UNITIA. |
| September 17 1913 |
Completed. Registered at Grimsby (GY924). |
| December 1914 |
Requisitioned for war service and converted for minesweeping duties. |
| 1919 |
Returned. |
| May 1923 | New boiler fitted. |
| May 28 1940 | Requisitioned for war service and converted for auxiliary patrol duties. |
| February 1941 | Converted for minesweeping duties. Renamed PORTIA (P.No.FY.1852). |
| January 14 1942 | Sold to Boston Deep Sea Fishing & Ice Co Ltd, Fleetwood (B. A. Parkes, Cleveleys, manager). |
| January 1946 | Returned after survey and restoration at Liverpool. Reverted to UNITIA (GY924). |
| March 25 1946 | Sold to Nordic Fishing Co Ltd, London. |
| July 28 1947 | Sold to Edna Deep Sea Fishing Co Ltd, London. |
| November 25 1950 | Sold to Kinbrace (Fishing) Ltd, Aberdeen (Joseph Craig, manager). Registered at Aberdeen (A663). |
| May 24 1952 | When in transit through Westray Firth, stranded on rocks between the islands of Rousay and Egilsay. |
| June 09 1952 | Refloated and delivered to Kirkwall. |
| 1954 | Sold to Belgian shipbreakers for demolition. |
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