HMS Sea Rover
HMS Sea Rover was a S-class submarine of the third batch built for the Royal Navy during World War II. She survived the war and was sold for scrap in 1949.

Design and description

The S-class submarines were designed to patrol the restricted waters of the North Sea and the Mediterranean Sea. The third batch was slightly enlarged and improved over the preceding second batch of the S-class. The submarines had a length of  overall, a beam of  and a draught of . They displaced  on the surface and  submerged. The S-class submarines had a crew of 48 officers and ratings. They had a diving depth of .

For surface running, the boats were powered by two  diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a  electric motor. They could reach  on the surface and  underwater. On the surface, the third batch boats had a range of  at  and  at  submerged.

The boats were armed with seven 21 inch (533 mm) torpedo tubes. A half-dozen of these were in the bow and there was one external tube in the stern. They carried six reload torpedoes for the bow tubes for a grand total of thirteen torpedoes. Twelve mines could be carried in lieu of the internally stowed torpedoes. They were also armed with a 3-inch (76 mm) deck gun. It is uncertain if Sea Rover was completed with a  Oerlikon light AA gun or had one added later. The third-batch S-class boats were fitted with either a Type 129AR or 138 ASDIC system and a Type 291 or 291W early-warning radar.

Construction and career
HMS Sea Rover was built by Scotts, of Greenock and launched on 8 February 1943. Thus far she has been the only ship of the Royal Navy to bear the name Sea Rover. The boat spent most of her career in the Far East, where she sank a number of Japanese ships, including the ship Matsu Maru No.1, the transport Shobu Maru, the auxiliary gunboat Koshu Maru, three sailing vessels, a coaster and four unidentified Japanese vessels. Sea Rover survived the Second World War, and was sold in October 1949 before being broken up at Faslane from June 1950.

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