| History | |
|---|---|
 United Kingdom | |
| Name | HMS D3 |
| Builder | Vickers Armstrong, Barrow-in-Furness |
| Laid down | 15 March 1910 |
| Launched | 17 October 1910 |
| Commissioned | 30 August 1911 |
| Fate | Sunk 12 March 1918 |
| General characteristics | |
| Class and type | D-class submarine |
| Displacement | Surfaced: 483 tons / Submerged: 595 tons |
| Length | 163.0 ft (49.7 m) (oa) |
| Beam | 13.6 ft (4.1 m) (oa) |
| Propulsion | 550 hp electric 1750 hp diesel twin screws |
| Speed | Surfaced:14.0 kn / Dived: 10.0 (design) 9.0 (service) |
| Range | Surface: 2500 nmi at 10 kn / Submerged:45 nmi at 5 knots |
| Complement | 25 |
| Armament | 3x18 in (46 cm) torpedo tubes (2 bow, 1 stern) |
HMS D3 was a D-class submarine of the British Royal Navy, one of eight of this class. D3 was built by Vickers at their Barrow-in-Furness works in 1910–1911, being launched on 17 October 1910 and completed on 30 August 1911.
D3 was active during the First World War, carrying out patrols in the North Sea and German Bight in the early years of the war, before transferring to anti-submarine patrols off Ireland in 1917 and to operations in the English Channel in 1918. D3 was sunk in a friendly fire incident by the French airship AT-0 off Dieppe on 12 March 1918, with the loss of all her crew.