Katsonis-class submarine

Class overview
Name	Katsonis class
Builders	Chantiers de la Gironde shipyard; Chantiers de la Loire shipyard;
Operators	Hellenic Navy
Preceded by	Delfin class
Succeeded by	Protefs class
Built	1925–1927
In commission	1927–1945
Completed	2
Lost	1
Retired	1
General characteristics
Type	Submarine
Displacement	surfaced: 576 tons;; submerged: 775 tons;
Length	62.5 m (205 ft)
Beam	5.3 m (17 ft)
Draft	3.6 m (12 ft)
Propulsion	one two-shaft Schneider-Carels diesel engine;; two electric engine motors;; 1,300 bhp, 1,000 shp;
Speed	surfaced: 14 kn (26 km/h; 16 mph); submerged: 9.5 kn (17.6 km/h; 10.9 mph);
Range	3,500 nmi (6,500 km; 4,000 mi) surfaced @ 10 kn (19 km/h; 12 mph)
Endurance	100 nmi (190 km; 120 mi) submerged @ 5 kn (9.3 km/h; 5.8 mph)
Test depth	260 ft (80 m)
Complement	30
Armament	2 × 21-inch (533 mm) internal bow T/T,; 2 × 21-inch (533 mm) external bow T/T,; 2 × 21-inch (533 mm) external stern T/T;; 1 × 100 mm gun, 2 MGs;

The Katsonis class was a French-built class of two submarines for the Hellenic Navy, serving from 1927–28 until the Second World War. The ships of the class were the first new submarines acquired by Greece after the First World War.

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