 HMS A3
| |
| History | |
|---|---|
 United Kingdom | |
| Name | HMS A4 |
| Builder | Vickers, Barrow-in-Furness |
| Laid down | 19 February 1902 |
| Launched | 9 June 1903 |
| Commissioned | 17 July 1904 |
| Fate | Sold for scrapping 16 January 1920 |
| General characteristics | |
| Class and type | A-class submarine |
| Displacement | 190 tons surfaced, 207 tons submerged |
| Length | 105.25 ft (32.08 m) |
| Beam | 12.75 ft (3.89 m) |
| Complement | 11 (2 officers and 9 ratings) |
| Armament | 2 × 18 inch (450 mm) torpedo tubes, plus two reloads |
HMS A4 was an early Royal Navy submarine.
She was a member of the first British A class of submarines. Like all her class, she was built at Vickers, Barrow-in-Furness.