Type U 87 submarine

Class overview
Builders	Germaniawerft, Kiel and Kaiserliche Werft Danzig
Operators	Imperial German Navy
Preceded by	Type U 81
Succeeded by	Type U 93
Completed	6
Lost	4
General characteristics
Class and type	Type U 87 submarine
Displacement	757 t (745 long tons) surfaced; 998 t (982 long tons) submerged;
Length	65.80 m (215 ft 11 in) (o/a); 50.07 m (164 ft 3 in) (pressure hull);
Beam	6.20 m (20 ft 4 in) (oa); 4.18 m (13 ft 9 in) (pressure hull);
Height	9.35 m (30 ft 8 in)
Draught	3.88 m (12 ft 9 in)
Installed power	2 × 2,400 PS (1,765 kW; 2,367 shp) surfaced; 2 × 1,200 PS (883 kW; 1,184 shp) submerged;
Propulsion	2 shafts, 2 × 1.66 m (5 ft 5 in) propellers
Speed	16.8 knots (31.1 km/h; 19.3 mph) surfaced; 9.1 knots (16.9 km/h; 10.5 mph) submerged;
Range	11,380 nmi (21,080 km; 13,100 mi) at 8 knots (15 km/h; 9.2 mph) surfaced; 56 nmi (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged;
Test depth	50 m (164 ft 1 in)
Complement	4 officers, 32 enlisted
Armament	4 × 50 cm (19.7 in) torpedo tubes (two bow, two stern); 10-12 torpedoes; 1 × 10.5 cm (4.1 in) SK L/45 deck gun; 1 × 8.8 cm (3.5 in) SK L/30 deck gun;

Type 87 was a class of U-boats built during World War I by the Kaiserliche Marine.