Italian submarine Galileo Galilei

Launch of Galileo Galilei in Taranto, 1934
History
Kingdom of Italy
Name	Galileo Galilei
Namesake	Galileo Galilei
Builder	Tosi, Taranto
Laid down	15 October 1931
Launched	19 March 1934
Commissioned	16 October 1934
Captured	by the Royal Navy, 19 June 1940
United Kingdom
Name	X-2, later P771
Acquired	June 1940
Commissioned	June 1942
Fate	Scrapped, January 1946
General characteristics
Class and type	Archimede-class submarine
Displacement	986 t (970 long tons) (surfaced) 1,259 t (1,239 long tons) (submerged)
Length	70.5 m (231 ft 4 in)
Beam	6.87 m (22 ft 6 in)
Draft	4.12 m (13 ft 6 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	17 knots (31 km/h; 20 mph) (surfaced) 7.7 knots (14.3 km/h; 8.9 mph) (submerged)
Range	10,300 nmi (19,100 km; 11,900 mi) at 8 knots (15 km/h; 9.2 mph) (surfaced) 105 nmi (194 km; 121 mi) at 3 knots (5.6 km/h; 3.5 mph) (submerged)
Armament	2 × single 100 mm (3.9 in) deck guns 2 × single 13.2 mm (0.52 in) machine guns 8 × 533 mm (21 in) torpedo tubes (4 bow, 4 stern)

Galileo Galilei was one of four Archimede-class submarines built for the Regia Marina (Royal Italian Navy) during the early 1930s. She was named after Galileo Galilei, an Italian astronomer and engineer.