British C-class submarine
| HMS C38 | |
| Class overview | |
|---|---|
| Name | C-class | 
| Builders | Vickers, Barrow; HM Dockyard Chatham | 
| Operators | Royal Navy | 
| Preceded by | B class | 
| Succeeded by | D class | 
| Subclasses | 
 | 
| In commission | 30 October 1906–1922 | 
| Completed | 38 | 
| Lost | 10 | 
| Retired | 28 | 
| General characteristics | |
| Type | Submarine | 
| Displacement | 
 | 
| Length | 143 ft 2 in (43.64 m) | 
| Beam | 13 ft 6 in (4.11 m) | 
| Propulsion | 600 hp (450 kW) Vickers petrol engine, 200 hp electric motor, single propeller | 
| Speed | 
 | 
| Range | 
 | 
| Complement | 16 | 
| Armament | 2 × 18-inch (450 mm) torpedo tubes (2 torpedoes) | 
The British C-class submarines were the last class of petrol engined submarines of the Royal Navy and marked the end of the development of the Holland class in the Royal Navy. Thirty-eight were constructed between 1905 and 1910 and they served through World War I.
With limited endurance and only a ten per cent reserve of buoyancy over their surface displacement, they were poor surface vessels, but their spindle shaped hull made for good underwater performance compared to their contemporaries.