Gustave Zédé-class submarine

	A Gustave Zédé-class submarine in the background behind the ex-German SMS U-139 in French service as Halbronn, Brest, France, February 1919
Class overview
Name	Gustave Zédé
Builders	Arsenal de Cherbourg
Operators	French Navy
Preceded by	Clorinde class
Succeeded by	Amphitrite class
Built	1911–16
In commission	1914–37
Completed	2
Scrapped	2
General characteristics (as built)
Type	Submarine
Displacement	850 t (837 long tons) (surfaced); 1,048–1,099 t (1,031–1,082 long tons) (submerged);
Length	74 m (242 ft 9 in) (o/a)
Beam	6 m (19 ft 8 in) (deep)
Draft	4.1–4.2 m (13 ft 5 in – 13 ft 9 in)
Installed power	1,640 PS (1,210 kW; 1,620 bhp) (electric motors) ; 3,500 PS (2,600 kW; 3,500 bhp) (Du Temple boilers) or; 2,400 PS (1,800 kW; 2,400 bhp) (diesels);
Propulsion	2 × shafts; 2 × electric motors; 2 × Diesel engines or; 2 × triple-expansion steam engines;
Speed	16 knots (30 km/h; 18 mph) (surfaced); 10–11 knots (19–20 km/h; 12–13 mph) (submerged);
Complement	43
Armament	2 × 450 mm (17.7 in) bow torpedo tubes; 6 × single external 450 mm torpedo launchers; 1 × 75 mm (3 in) deck gun (Néréide only);

The Gustave Zédé class consisted of a pair of submarines, Gustave Zédéand Néréide, built for the French Navy just before World War I. Both boats were intended to use diesel engines, but those ordered for Gustave Zédé were cancelled and steam engines substituted while she was under construction.

Class overview
A Gustave Zédé-class submarine in the background behind the ex-German SMS U-139 in French service as Halbronn, Brest, France, February 1919
Name	Gustave Zédé
Builders	Arsenal de Cherbourg
Operators	French Navy
Preceded by	Clorinde class
Succeeded by	Amphitrite class
Built	1911–16
In commission	1914–37
Completed	2
Scrapped	2
General characteristics (as built)
Type	Submarine
Displacement	850 t (837 long tons) (surfaced) 1,048–1,099 t (1,031–1,082 long tons) (submerged)
Length	74 m (242 ft 9 in) (o/a)
Beam	6 m (19 ft 8 in) (deep)
Draft	4.1–4.2 m (13 ft 5 in – 13 ft 9 in)
Installed power	1,640 PS (1,210 kW; 1,620 bhp) (electric motors) 3,500 PS (2,600 kW; 3,500 bhp) (Du Temple boilers) or 2,400 PS (1,800 kW; 2,400 bhp) (diesels)
Propulsion	2 × shafts; 2 × electric motors 2 × Diesel engines or 2 × triple-expansion steam engines
Speed	16 knots (30 km/h; 18 mph) (surfaced) 10–11 knots (19–20 km/h; 12–13 mph) (submerged)
Complement	43
Armament	2 × 450 mm (17.7 in) bow torpedo tubes 6 × single external 450 mm torpedo launchers 1 × 75 mm (3 in) deck gun (Néréide only)