Bellone-class submarine

Unidentified Bellone-class submarine underway at Toulon, 1914–18
Class overview
Name:	Bellone
Operators:	French Navy
Preceded by:	Amphitrite class
Succeeded by:	Diane class
Built:	1913–18
In service:	1914–35
Completed:	3
Scrapped:	3
General characteristics (as built)
Type:	Submarine
Displacement:	540 t (531 long tons) (surfaced) 804 t (791 long tons) (submerged)
Length:	60.6 m (198 ft 10 in) (o/a)
Beam:	5.4 m (17 ft 9 in) (deep)
Draft:	3.41 m (11 ft 2 in)
Installed power:	2 × 900 PS (660 kW; 890 hp) diesel engines 2 × 400 PS (290 kW; 390 hp) electric motors
Propulsion:	2 shafts
Speed:	14 knots (26 km/h; 16 mph) (surfaced) 9.5 knots (17.6 km/h; 10.9 mph) (submerged)
Range:	2,300 nmi (4,300 km; 2,600 mi) at 10 knots (19 km/h; 12 mph) (surfaced) 100 nmi (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph) (submerged)
Test depth:	50 m (164 ft 1 in)
Complement:	28 crew
Armament:	2 × external bow 450 mm (17.7 in) torpedo tubes 2 × external stern 450 mm torpedo tubes 4 × single 450 mm rotating torpedo launchers 1 × single 75 mm (3.0 in) Canon de 75 modèle 1897 deck gun

The Bellone class was a group of three submarines built for the French Navy during World War I.

Two of these three ships, the Gorgone and the Hermione, served in the Adriatic during World War I. The third ship, the Bellone, operated in the Atlantic during that time. As of 1935, all three ships were in the French Mediterranean Fleet, and during that year were stricken (i.e. removed from the naval register).