Italian 600 Series submarines

Class overview
Name	600 Series
Operators	Regia Marina
Subclasses	Argonauta class; Sirena class; Perla class; Adua class; Acciaio class;
Built	1932–1941
In commission	1933–1942
Completed	59
Lost	48
Retired	11
General characteristics
Type	Submarine
Displacement	650–715 tonnes (640–704 long tons) surfaced; 810–870 tonnes (800–860 long tons) submerged;
Length	61.5–60.18 m (201.8–197.4 ft)
Beam	5.65–6.44 m (18.5–21.1 ft)
Draught	4.64–4.78 m (15.2–15.7 ft)
Propulsion	2 diesel 1,500–1,400 hp (1–1 MW); 2 electric 800–800 hp (1–1 MW);
Speed	14–14 knots (26–26 km/h; 16–16 mph)surfaced; 8–7.3 knots (14.8–13.5 km/h; 9.2–8.4 mph)submerged;
Range	2,300ml surfaced; 110-80 ml submerged;
Complement	44–48
Armament	6× 533 mm (21 in) Torpedo tube; 1 × 100 mm (4 in) gun; 2-4 13.2 mm (1 in) MG;

The Italian 600 Series submarines were a series of submarine classes built for the Italian Royal Navy (Regia Marina) during the Inter war years.