French submarine Plongeur

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The French submarine Plongeur, 1863.
History
France
Operator	French Navy
Ordered	1859
Builder	Arsenal de Rochefort
Laid down	1 June 1860
Launched	16 April 1863
Stricken	2 February 1872
General characteristics
Displacement	381 t (420 tons) in displacement
Length	45 m (146 ft)[1]
Beam	3.7 m (12 ft)
Propulsion	Compressed air engine with 153 m3 (5,403 ft3) of compressed air at 12.5 bar (1.25 MPa, 180 psi).
Speed	4 kn (7.2 km/h)
Range	5 nmi (9 km)
Test depth	10 metres
Complement	12
Armament	Spar torpedo

Plongeur (French for "Diver") was a French submarine launched on 16 April 1863. She was the first submarine in the world to be propelled by mechanized (rather than human) power.

Captain Siméon Bourgeois, who made the plans, and naval constructor Charles Brun began working on the design in 1859 at Rochefort.