| Built By: | Armstrong Whitworth (Tyne) |
| Build Group: | G |
| Fate: | Sold 4th November 1921 |
11th Flotilla. Blyth.
| 01-12-1914 | Laid Down |
| 07-12-1915 | Launched |
| 10-05-1916 | Completed |
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| Length overall | 187 ft 1 inch |
| Beam | 15 ft 4 inch |
| Depth | 16 ft 7 inch |
| Displacement | 703 tons (surface) |
| 837 tons (submerged) | |
| Diving Depth | 200 ft |
| Speed | Surface 15.5 knots (design) |
| Surface 14 knots (service) | |
| Submerged 9.5 to 10 knots (design) | |
| Submerged 9 knots (service) | |
| No. of shafts | 2 |
| Propeller | 3 blades, 5 ft 8 inch diameter |
| Armament | 2 x 18 inch bow tubes |
| 2 x 18 inch beam tubes | |
| 1 21 inch stern tube | |
| (10 torpedoes carried) | |
| 1 x 2-pounder gun | |
| Endurance | Surface: 2600 miles at 12.5 knots (design) |
| Surface: 1650 miles at full power (service) | |
| Submerged: 99 miles at 3 knots (design) | |
| Submerged: 95 miles at 3 knots (service) | |
| Complement | 3 Officers and 28 ratings |
Having reported on the sinking of Submarine H29 in Devonport Dockyard in 1926 with several fatalities, on the causes of the accident and the subsequent Courts Martial of the Commanding Officer and the First Lieutenant where both were found guilty of the charges and the First Lieutenant was 'dismissed his ship'.
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