Émeraude-class submarine (1906)

Émeraude in Cherbourg harbour, 31 July 1909
Class overview
NameÉmeraude class
Operators French Navy
Preceded byOméga
Succeeded byCircé class
Built1903–1910
In commission1908–1919
Completed6
Lost1
Scrapped5
General characteristics (as built)
TypeSubmarine
Displacement
  • 395 t (389 long tons) (surfaced)
  • 427 t (420 long tons) (submerged)
Length44.9 m (147 ft 4 in) (o/a)
Beam3.9 m (12 ft 10 in)
Draft3.77 m (12 ft 4 in)
Installed power
Propulsion2 × shafts; 2 × diesels; 2 × electric motors
Speed
  • 11.26 knots (20.85 km/h; 12.96 mph) (surfaced)
  • 8.7 knots (16.1 km/h; 10.0 mph) (submerged)
Range
  • 2,000 nmi (3,700 km; 2,300 mi) at 7.3 knots (13.5 km/h; 8.4 mph) (surfaced)
  • 100 nmi (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph) (submerged)
Test depth40 m (130 ft)
Complement2 officers and 23 crewmen
Armament4 × 450 mm (17.7 in) torpedo tubes (2 × bow, 2 × stern)

The Émeraude-class submarines consisted of six submarines built for the French Navy (Marine Nationale) during the first decade of the 20th century. One boat was sunk and another captured during the First World War and the survivors were scrapped after the war.