French submarine Marsouin (1924)

The French submarine Marsouin was a Requin-class submarine built for the French Navy in the mid-1920s. Laid down in November 1922, it was launched in December 1924 and commissioned in September 1927. It escaped from Toulon on 27 November 1942 and joined the Free French Naval Forces; it was later disarmed at Oran in April 1944, and stricken on 28 February 1946.

Design
78 m long, with a beam of 6.8 m and a draught of 5.1 m, Requin-class submarines could dive up to 80 m. The submarine had a surfaced displacement of 1150 LT and a submerged displacement of 1441 LT. Propulsion while surfaced was provided by two 2900 hp diesel motors and two 1800 hp electric motors. The submarines' electrical propulsion allowed it to attain speeds of 9 kn while submerged and 15 kn on the surface. Their surfaced range was 7700 nmi at 9 kn, and 4000 nmi at 12 kn, with a submerged range of 70 nmi at 5 kn.