Mameli-class submarine

Class overview
Name	Mameli class
Builders	Cantieri navali Tosi di Taranto, Taranto
Operators	Regia Marina
Preceded by	Micca class
Succeeded by	Pisani class
Built	1925–1929
In commission	1929–1948
Completed	4
Lost	1
Scrapped	3
General characteristics
Type	Submarine
Displacement	823 t (810 long tons) (surfaced) 1,009 t (993 long tons) (submerged)
Length	64.6 m (212 ft)
Beam	6.51 m (21 ft 4 in)
Draft	4.3 m (14 ft 1 in)
Installed power	1,550 bhp (1,160 kW) (diesels) 550 hp (410 kW) (electric motors)
Propulsion	2 shafts; diesel-electric 2 × diesel engines 2 × electric motors
Speed	15 knots (28 km/h; 17 mph) (surfaced) 8 knots (15 km/h; 9.2 mph) (submerged)
Range	4,360 nmi (8,070 km; 5,020 mi) at 8 knots (15 km/h; 9.2 mph) (surfaced) 110 nmi (200 km; 130 mi) at 3 knots (5.6 km/h; 3.5 mph) (submerged)
Test depth	90 m (300 ft)
Armament	1 × single 102 mm (4 in) deck gun 2 × single 13.2 mm (0.52 in) machine guns 6 × 533 mm (21 in) torpedo tubes (4 bow, 2 stern)

The Mameli-class submarine was one of the first classes of the submarines to be built for the Regia Marina (Royal Italian Navy) after the First World War. Some of these boats played a minor role in the Spanish Civil War of 1936–1939 supporting the Spanish Nationalists. Of the four boats built in this class, all but one survived the Second World War.