Type U 139 submarine

Class overview
Builders	Germaniawerft, Kiel
Operators	Imperial German Navy
Completed	3
General characteristics
Displacement	1,930 t (1,900 long tons) surfaced; 2,483 t (2,444 long tons) submerged;
Length	92.00 m (301 ft 10 in) (o/a); 71.50 m (234 ft 7 in) (pressure hull);
Beam	9.12 m (29 ft 11 in) (o/a); 5.75 m (18 ft 10 in) (pressure hull);
Height	11.20 m (36 ft 9 in)
Draught	5.27 m (17 ft 3 in)
Installed power	2 × diesel engines, 3,300 PS (2,400 kW; 3,300 shp) surfaced; 1,780 PS (1,310 kW; 1,760 shp) submerged;
Propulsion	2 shafts; 2.10 m (6 ft 11 in) propellers
Speed	15.8 knots (29.3 km/h; 18.2 mph) surfaced; 7.6 knots (14.1 km/h; 8.7 mph) submerged;
Range	17,750 nautical miles (32,870 km; 20,430 mi) at 8 knots (15 km/h; 9.2 mph) surfaced; 53 nautical miles (98 km; 61 mi) at 4.5 knots (8.3 km/h; 5.2 mph) submerged;
Test depth	75 m (246 ft)
Boats & landing ; craft carried	1 cutter
Complement	6 officers, 56 men (1+20 as prize crew)
Armament	6 × 50 cm (19.7 in) torpedo tubes (4 bow, 2 stern); 24 G6 torpedoes ; 2 × 15 cm (5.9 in) SK L/45 deck guns with 980 rounds; 2 × 8.8 cm (3.5 in) SK L/30 deck guns with 200 rounds;

U-139, originally designated "Project 46", was a class of large, long-range U-boats built during World War I by the Kaiserliche Marine.