U-20 Specifications

Type	U 19 class
Displacement	650 tons (surface) 827 tons (submerged)
Length	64.2 meters / 210.6 feet
Beam	6.1 meters / 20.0 feet
Draft	3.6 meters / 11.8 feet
Speed	28.7 km/h / 15.5 knots (surface) 17.6 km/h / 9.5 knots (submerged)
Range	9,800 km / 5,300 nautical miles at 15 km/h / 8.1 knots
Armament	– Four 50 cm / 19.7 inch torpedo tubes (two bow, two stern, nine torpedoes) – 1 x 88 mm / 3.46 inch deck gun (two guns from 1916)
Shipyard	Kaiserliche Werft, Danzig (Werk 14)
Ordered	25 November 1910
Laid down	7 November 1911
Launched	18 December 1912
Commissioned	5 August 1913
Commanders	– Otto Dröscher (1 August 1914 – 15 December 1914) – Walther Schwieger (16 December 1914 – 5 November 1916)
Career	7 patrols (1 August 1914 – 4 November 1916), Kaiserliche Marine: III Flotille
Successes	– 37 ships sunk (145,830 tons) – 2 ships damaged (2,643 tons)
Fate	Grounded 4 November 1916 on Danish coast at 56°33′N 08°08′E and destroyed by her crew the next day