HMS Ocean

Sunk

Type	Pre-dreadnought battleship
Class	Canopus
War	First World War
Main guns	4 × BL 12 in (305 mm) 35-caliber Mk VIII guns

Pre-dreadnought. Mined on 18 March 1915 while trying to help Irresistible.

We have here a picture of the great battleship HMS Ocean, one of the newest and most powerful vessels in the Mediterranean Fleet (1901). Of 12950 tons displacement, steaming eighteen knots an hour, armoured over two-thirds of her length, carrying four twelve-inch guns, twelve quick-firing 100 pounde Photo: Bourne & Shepherd, Calcutta for Cassell & Co., Public domain · Wikimedia Commons

Armament and specifications

Armament

4 × BL 12 in (305 mm) 35-caliber Mk VIII guns
12 × QF 6 in (152 mm) 40-caliber guns
10 × 12-pounder 76 mm (3 in) quick-firing guns
6 × 3-pounder guns
4 × 18 in (457 mm) torpedo tubes

Armour

Belt: 6 in
Bulkheads: 6–10 in (152–254 mm)
Barbettes: 12 in
Gun turrets: 8 in (203 mm)
Casemates: 5 in (127 mm)
Conning tower: 12 in
Deck: 1–2 in (25–51 mm)

Builder	Devonport Dockyard
Laid down	15 February 1897
Launched	5 July 1898
Commissioned	20 February 1900
Displacement	Full load: 14,300 long tons (14,500 t)
Length	421 ft 6 in (128.5 m) (loa)
Speed	18 knots (33 km/h)
Complement	750

As built, from the ship's Wikipedia article. Figures there may cover later refits too.

Career

Launched

5 July 1898

Attack on the Dardanelles Narrows

Sunk

18 March 1915

Mined