| Name: | USURPER launched as P 56 | 
| Type: | Submarine | 
| Keel: | 18/09/1941 | 
| Launched: | 24/09/1942 | 
| Completed: | 02/02/1943 | 
| Builder: | Vickers-Armstrongs Ltd | 
| Yard: | High Walker | 
| Yard Number: | 45 | 
| Dimensions: | 545disp surf, 740disp subm, 197.0ft x 16.0 x 12.8(draft)ft | 
| Engines: | 2 x Oil engines, RXS type, 6cyl (9.5 x 12ins), 400bhp; 2 x Electric motors, 275Kw | 
| Engines by: | Davey, Paxman & Co Ltd, Colchester | 
| Paxman Ricardo diesel generators | |
| Propulsion: | 2 x Screws, 11.5knots surf, 9.0knots subm | 
| Construction: | Steel | 
| Armament: | 1 x 3.0ins gun, 4 x 21.0ins torpedoes | 
| History: | |
| 02/02/1943 | British Royal Navy | 
| 03/10/1943 | Sank | 
| Comments: | Member of the U Class (Group 2) of submarines | 
| 24/09/1942: Launched as P 56 | |
| 03/10/1943: Sunk by German patrol vessel UJ 2208, off Genoa, with the loss of 35 crew | 

Above photo is courtesy of the Barrow Submariners Association

Profile & Decks plan of a typical U/V Class (Group 2) courtesy of MP Cocker. Click HERE to enlarge