HMS Surf
HMS Surf was a [British British S-class submarine (1931)|S-class submarine (1931)|S-class] submarine of the third batch built for the Royal Navy during World War II. She survived the war and was scrapped in 1948.
Design and description
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 draft 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 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 [QF 3-inch 20 cwt|] deck gun.