The second batch of S-classsubmarines 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.[1] The submarines had a length of 208 feet 8 inches (63.6 m) overall, a beam of 24 feet 0 inches (7.3 m) and a mean draught of 11 feet 10 inches (3.6 m). They displaced 768 long tons (780 t) on the surface and 960 long tons (980 t) submerged.[2] The S-class submarines had a crew of 40 officers and ratings. They had a diving depth of 300 feet (91 m).[3]
For surface running, the boats were powered by two 775-brake-horsepower (578 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 650-horsepower (485 kW) electric motor. They could reach 13.75 knots (25.47 km/h; 15.82 mph) on the surface and 10 knots (19 km/h; 12 mph) underwater.[4] On the surface, the second-batch boats had a range of 6,000 nautical miles (11,000 km; 6,900 mi) at 10 knots (19 km/h; 12 mph) and 64 nmi (119 km; 74 mi) at 2 knots (3.7 km/h; 2.3 mph) submerged.[3]
She had an eventful career after the outbreak of war. Under the command of Lieutenant Commander (later Rear Admiral) Benjamin Bryant, she attacked the German submarine U-21 off the Dogger Bank in November 1939, but failed to sink her. Her first success was the German merchant August Leonhardt, sunk in April 1940 off the Danish island of Anholt. She later attacked the German merchant Moltkefels, but failed to hit her. She fired upon the beached Palime, and unsuccessfully attacked U-62 in July 1940. She finished her patrol by sinking the Norwegian merchant Toran and attacking but failing to sink the German merchant Cläre Hugo Stinnes in August.
On 5 February 1941 she shelled and sank the Norwegian Hurtigruten cargo-passenger ship Ryfylke. In May of that year Sealion unsuccessfully attacked U-74. In July she attacked French shipping, sinking the French fishing vessels Gustav Eugene and Gustav Jeanne, and on succeeding days, Christus Regnat and St Pierre d'Alcantara.
Akermann, Paul (2002). Encyclopaedia of British Submarines 1901–1955 (reprint of the 1989 ed.). Penzance, Cornwall: Periscope Publishing. ISBN1-904381-05-7.
Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN0-87021-962-6.
Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN0-85177-146-7.
McCartney, Innes (2006). British Submarines 1939–1945. New Vanguard. Vol. 129. Oxford, UK: Osprey. ISBN1-84603-007-2.
Rohwer, Jürgen (2005). Chronology of the War at Sea 1939–1945: The Naval History of World War Two (Revised & Expanded ed.). Annapolis, Maryland: Naval Institute Press. ISBN1-59114-119-2.
United Kingdom
