River-class submarine

HMS Thames
Class overview
Name	River-class
Builders	Vickers-Armstrong
Operators	Royal Navy
Preceded by	S class
Succeeded by	Grampus class
Cost	circa £500,000 (in 1931-1933)
Built	1931-1934
In service	1934-1945
In commission	1934-1945
Planned	20
Completed	3
Cancelled	17
Lost	1
Retired	2
General characteristics
Type	Submarine
Displacement	2,206 tons surfaced (Thames 2,165 tons) 2,723 tons submerged (Thames 2,680 tons)
Length	345 ft (105 m)
Beam	28 ft 3 in (8.61 m)
Draught	15 ft 11 in (4.85 m)
Propulsion	2 shaft diesel electric 2 supercharged diesels 10,000 hp (7,500 kW) max 2 electric motors 2,500 hp (1,900 kW)
Speed	22 knots (41 km/h) surfaced 10 knots (19 km/h) submerged
Range	12,000 nmi (22,000 km; 14,000 mi) at 12 kn (22 km/h; 14 mph) surfaced
Test depth	300 feet (91 m), entered into records as max depth
Complement	61
Sensors and processing systems	ASDIC
Armament	6 × 21-inch (533 mm) torpedo tubes (bow) 1 × QF 4-inch (101.6 mm) Mk XII deck gun
Aircraft carried	none
Notes	Last fleet submarine design adopted by the Royal Navy

The River class, or Thames class, were a class of submarines built for the Royal Navy. Operating during the Second World War, the three boats of the class comprised Thames, Severn and Clyde. All the submarines were named after rivers in the United Kingdom. One was lost during the war and the rest taken out of service following it.