HMS Seawolf (47S)


HMS Seawolf was a second-batch S-class submarine built during the 1930s for the Royal Navy. Completed in 1936, the boat fought in the Second World War.

Design and description

The second batch of S-class submarines were designed as slightly improved and enlarged versions of the earlier boats of the class and were intended to operate in the North and Baltic Seas. The submarines had a length of overall, a beam of and a mean draught of. They displaced on the surface and submerged. The S-class submarines had a crew of 40 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 second-batch boats had a range of at and at submerged.
The S-class boats were armed with six 21-inch torpedo tubes in the bow. They carried six reload torpedoes for a total of a dozen torpedoes. They were also armed with a 3-inch deck gun.

Construction and career

Ordered on 15 March 1934, Seawolf was laid down on 25 May 1934 in Scotts Shipbuilding & Engineering's shipyard in Greenock and was launched on 28 November 1935. The boat was completed on 12 March 1936.

Wartime career

Seawolf was a member of the 2nd Submarine Flotilla at the onset of war. From 23–26 August 1939, the 2nd Submarine Flotilla deployed to its wartime bases at Dundee and Blyth. On 6 October 1939, she attacked the German light cruiser and the torpedo boat Falke in the Skagerrak, but none of the targets were hit. In April 1940, Seawolf sank the German merchant Hamm, and in November, claimed to have sunk the German merchant Bessheim. Bessheim was mined and sunk the previous day off Hammerfest, so Seawolf had probably attacked another merchant.
She was one of a number of submarines ordered to track before her eventual sinking. On 6 March 1942, Seawolf sighted, along with her escorting destroyers,, and. The German ships had sailed from Trondheim, Norway with the intention of attacking convoy PQ 12.
Seawolf arrived in Halifax, Nova Scotia in 1943 to help the Royal Canadian Navy in anti-submarine warfare training. She was commanded from August 1943 until 23 August 1944 by Commander Denis Woolnough Mills, for whom Seawolf was his first command after being promoted from First Lieutenant of HMS Thunderbolt.
Seawolf was sold for breaking up in November 1945 to Marine Industries, of Montreal.

Citations