The Circé-class submarines were a sub-class of the 600 Series of submarines built for the French Navy prior to World War II. There were four vessels in the class, built to a Schneider-Laubeuf design. They were ordered in 1925 and completed by 1927.[1][2]
The four boats of the Circé class saw action during the Second World War, from September 1939 until the French armistice in June 1940.
The Circé class had a displacement of 615 tons surfaced and 776 tons submerged. They had an endurance of 3,500 miles at 7.5 knots (13.9 km/h; 8.6 mph), with a maximum surface speed of 14 knots (26 km/h; 16 mph), and a submerged speed of 7.5 knots (13.9 km/h; 8.6 mph). Their armament was seven torpedo tubes (three forward, two midships, and two aft) with an outfit of 13 torpedoes. As with all French submarines of this period, the midships torpedo tubes were fitted externally in trainable mounts. They had a single 75 mm (3 in) deck gun and two 8 mm (0.31 in) machine guns, and were manned by crews of 41 men.