French submarine Mariotte

A postcard of Mariotte on sea trials, Cherbourg, circa 1912. The doors for the Drzewiecki drop collar are open.
Class overview
Name	Mariotte
Operators	French Navy
Preceded by	Archimède
Succeeded by	Amiral Bourgois
History
France
Name	Mariotte
Namesake	Edme Mariotte
Ordered	31 December 1906
Builder	Arsenal de Cherbourg
Laid down	30 March 1908
Launched	2 February 1911
Commissioned	5 February 1913
Nickname(s)	Brosse à dents (toothbrush)
Fate	Scuttled, 26 July 1915
General characteristics
Type	Submarine
Displacement	545 t (536 long tons) (surfaced) 664 t (654 long tons) (submerged)
Length	64.75 m (212 ft 5 in) (p/p)
Beam	4.3 m (14 ft 1 in)
Draft	3.82 m (12 ft 6 in)
Depth	7.25 m (23 ft 9 in)
Installed power	2 × 700 PS (515 kW) (diesel) 2 × 500 PS (368 kW) (electric)
Propulsion	2 × propeller shafts 2 × diesel engines, surfaced 2 × electric motors, submerged
Speed	14.2 knots (26.3 km/h; 16.3 mph) (surfaced) 11.7 knots (21.7 km/h; 13.5 mph) (submerged)
Range	1,658 nmi (3,071 km; 1,908 mi) at 10 knots (19 km/h; 12 mph) (surfaced) 143 nmi (265 km; 165 mi) at 5 knots (9.3 km/h; 5.8 mph) (submerged)
Test depth	35 m (114 ft 10 in)
Complement	32 officers and enlisted men
Armament	4 × 450 mm (17.7 in) bow torpedo tubes 2 × Drzewiecki drop collars 8 torpedoes

The French submarine Mariotte was a submarine built for the French Navy prior to World War I. Intended to accompany the fleet, she was designed for high speed on the surface. Although the navy was unsatisfied with her performance on the surface, the boat had a higher underwater speed than any French submarine before or during the following 35 years. Mariotte was plagued with engine problems during her construction and the navy spent years fixing the various issues before finally commissioning her five years after beginning construction. During the war, she participated in the Dardanelles Campaign, but had to be scuttled after she became entangled in the cables of a minefield on her first attempt to penetrate the Dardanelles.