Naïade-class submarine

Three Naïade-class submarines; Grondin (foreground) with two others (not identified).
Class overview
NameNaïade class
Operators French Navy
Costfr. 365,000 per unit
Built1903–1905
In commission1903–1914
Completed20
Scrapped19
Preserved1
General characteristics
TypeSubmarine
Displacement
  • 70.5 t (69.4 long tons), (surfaced)
  • 73.6 t (72.4 long tons) (submerged)
Length24 m (78 ft 9 in)
Beam2.26 m (7 ft 5 in)
Draft2.54 m (8 ft 4 in)
Installed power
  • 65 PS (64 bhp; 48 kW) (petrol engine)
  • 70 PS (69 bhp; 51 kW) (electric motor)
Propulsion
Speed
  • 7.2 knots (13.3 km/h; 8.3 mph) (surfaced)
  • 6 kn (11 km/h; 6.9 mph) (submerged)
Range
  • 200 nmi (370 km; 230 mi) at 5.5 knots (10.2 km/h; 6.3 mph) (surfaced)
  • 30 nmi (56 km; 35 mi) at 4.1 kn (7.6 km/h; 4.7 mph) (submerged)
Test depth30 m (98 ft)
Complement9
Armament2 × single 450 mm (17.7 in) torpedoes in Drzewiecki drop collars

The Naïade-class submarines, sometimes referred to as the Perle class were a group of submarines built for the French Navy at the beginning of the 20th century. There were twenty vessels in this class, which was designed by Gaston Romazotti. The class introduced internal combustion engines into French submarine design. They remained in service until just prior to the outbreak of the First World War in 1914.