HMS Ursula (S42)

HMCS Corner Brook entering St John's Harbour on the east end of Newfoundland
History
United Kingdom
Name:	Ursula
Builder:	Cammell Laird, Birkenhead
Laid down:	10 January 1989
Launched:	22 February 1991
Commissioned:	8 May 1992
Decommissioned:	16 October 1994
Fate:	Transferred to Canada
Canada
Name:	Corner Brook
Acquired:	1998
Commissioned:	March 2003
Status:	in active service
General characteristics
Class and type:	Upholder/Victoria-class submarine
Displacement:	2,185 long tons (2,220 t) surfaced 2,400 long tons (2,439 t) submerged
Length:	70.26 m (230 ft 6 in)
Beam:	7.6 m (24 ft 11 in)
Draught:	5.5 m (18 ft 1 in)
Propulsion:	Diesel-electric (37 MW) 2 Paxman Valenta 16 RPA diesel generators, 4,070 hp (3,035 kW) 2 GEC 5,000 kW motor-generators
Speed:	12 knots (22 km/h; 14 mph) surfaced 20 kn (23 mph; 37 km/h)+ submerged
Range:	10,000 nautical miles (18,500 km) at 12 knots (22 km/h)
Test depth:	200 m (660 ft)
Complement:	53 officers and crew
Armament:	6 × 21 in (530 mm) torpedo tubes 18 × Mark 48 torpedoes

HMCS Corner Brook is a long-range hunter-killer submarine (SSK) of the Royal Canadian Navy. She is the former Royal Navy Upholder-class submarine HMS Ursula (S42), purchased from the British at the end of the Cold War. She is the third boat of the Victoria class and is named after the city of Corner Brook, Newfoundland.

As built the Upholder/Victoria class was designed as a replacement for the Oberon class for use as hunter-killer and training subs. The submarines, which have a single-skinned, teardrop-shaped hull, displace 2,220 long tons (2,260 t) surfaced and 2,455 long tons (2,494 t) submerged. They are 230 feet 7 inches (70.3 m) long overall with a beam of 25 feet 0 inches (7.6 m) and a draught of 17 feet 8 inches (5.4 m).

The submarines are powered by a one shaft diesel-electric system. They are equipped with two Paxman Valenta 1600 RPS SZ diesel engines each driving a 1.4-megawatt (1,900 hp) GEC electric alternator with two 120-cell chloride batteries. The batteries have a 90-hour endurance at 3 knots (5.6 km/h; 3.5 mph). The ship is propelled by a 4.028-megawatt (5,402 hp) GEC dual armature electric motor turning a seven-blade fixed pitch propeller. They have a 200-long-ton (200 t) diesel capacity. This gives the subs a maximum speed of 12 knots (22 km/h; 14 mph) on the surface and 20 knots (37 km/h; 23 mph) submerged. They have a range of 8,000 nautical miles (15,000 km; 9,200 mi) at 8 knots (15 km/h; 9.2 mph) and 10,000 nautical miles (19,000 km; 12,000 mi) at snorting depth. They have a range of 8,000 nautical miles (15,000 km; 9,200 mi) at 8 knots (15 km/h; 9.2 mph). The class has a reported dive depth of over 650 feet (200 m).