Italian submarine Marcantonio Colonna

	Vettore Pisani on the surface
History
Name	Marcantonio Colonna
Namesake	Marcantonio Colonna
Builder	Cantiere Navale Triestino, Trieste
Laid down	3 December 1925
Launched	26 December 1927
Completed	10 July 1929
Decommissioned	16 April 1942
Fate	Scrapped, 1943
General characteristics
Class & type	Pisani-class submarine
Displacement	866 long tons (880 t) surfaced; 1,040 long tons (1,057 t) submerged;
Length	68.2 m (223 ft 9 in)
Beam	6.09 m (20 ft)
Draught	4.93 m (16 ft 2 in)
Installed power	3,000 bhp (2,200 kW) (diesels); 1,100 hp (820 kW) (electric motors);
Propulsion	2 shafts; diesel-electric; 2 × diesel engines; 2 × electric motors;
Speed	15 knots (28 km/h; 17 mph) surfaced; 8.2 knots (15.2 km/h; 9.4 mph) submerged;
Range	5,000 nmi (9,300 km; 5,800 mi) at 8 knots (15 km/h; 9.2 mph); 70 nmi (130 km; 81 mi) at 4 knots (7.4 km/h; 4.6 mph);
Test depth	90 m (300 ft)
Complement	48
Armament	6 × 21 in (533 mm) torpedo tubes (4 bow, 2 stern); 1 × 102 mm (4 in) deck gun; 2 × 13.2 mm (0.52 in) machine guns;

Marcantonio Colonna was one of four Pisani-class submarines built for the Regia Marina (Royal Italian Navy) during the late 1920s. Due to her age, her usefulness was limited, and she saw no real service during the war. The submarine was decommissioned in 1942 and scrapped the following year.