Marconi-class submarine

Leonardo Da Vinci, the most successful Italian submarine in World War II
Class overview
Operators
In commission1940–1945
Completed6
Lost5
General characteristics
TypeSubmarine
Displacement
  • 1,195 long tons (1,214 t) (surfaced)
  • 1,490 long tons (1,514 t) (submerged)
Length76.5 m (251 ft 0 in)
Beam6.81 m (22 ft 4 in)
Draught4.72 m (15 ft 6 in)
Propulsion
Speed
  • 17.8 kn (33.0 km/h; 20.5 mph) (surfaced)
  • 8.2 kn (15.2 km/h; 9.4 mph) (submerged)
Range
  • Surfaced: 2,900 nmi (5,400 km; 3,300 mi) at 17 kn (31 km/h; 20 mph); 10,500 nmi (19,400 km; 12,100 mi) at 8 kn (15 km/h; 9.2 mph)
  • Submerged: 8 nmi (15 km; 9.2 mi) at 8 kn (15 km/h; 9.2 mph); 110 nmi (200 km; 130 mi) at 3 kn (5.6 km/h; 3.5 mph)
Test depth90 m (300 ft)+
Complement57
Armament

The Marconi class was a class of six submarines built for the Royal Italian Navy (Italian: Regia Marina). The submarines were all launched between 1939 and 1940, and all but one, Luigi Torelli, were lost in the Atlantic during the Second World War.