SM UB-18

SM UB-45 a u-boat similar to UB-18
History
German Empire
Name:	UB-18
Ordered:	30 April 1915
Builder:	Blohm & Voss, Hamburg
Yard number:	248
Launched:	21 August 1915
Completed:	10 December 1915
Commissioned:	11 December 1915
Fate:	rammed and sunk, 9 December 1917
General characteristics
Class and type:	German Type UB II submarine
Displacement:	263 t (259 long tons) surfaced 292 t (287 long tons) submerged
Length:	36.13 m (118 ft 6 in) o/a 27.13 m (89 ft) pressure hull
Beam:	4.36 m (14 ft 4 in) o/a 3.85 m (13 ft) pressure hull
Draught:	3.70 m (12 ft 2 in)
Propulsion:	1 × propeller shaft 2 × four-stroke 6-cylinder diesel engine, 284 PS (209 kW; 280 bhp) 2 × electric motor, 280 PS (210 kW; 280 shp)
Speed:	9.15 knots (16.95 km/h; 10.53 mph) surfaced 5.81 knots (10.76 km/h; 6.69 mph) submerged
Range:	6,650 nmi (12,320 km; 7,650 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	50 m (160 ft)
Complement:	2 officers, 21 men
Armament:	2 × 50 cm (19.7 in) torpedo tubes 4 × torpedoes (later 6) 1 × 5 cm SK L/40 gun
Notes:	45-second diving time
Service record
Part of:	German Imperial Navy: Flanders Flotilla 16 February 1916 – 9 December 1917
Commanders:	Oblt.z.S. Franz Wäger 11 December 1915 – 15 February 1916 Oblt.z.S. Otto Steinbrinck 16 February – 27 October 1916 Oblt.z.S. Claus Lafrenz 28 October 1916 – July 1917 Oblt.z.S. Ulrich Meier 8 July – 21 September 1917 Oblt.z.S. Georg Niemeyer 22 September – 9 December 1917
Operations:	31 patrols
Victories:	126 merchant ships sunk (129,782 GRT) 4 merchant ships sunk (7,418 GRT) 2 warships sunk (1,783 tons)

SM UB-18 was a German Type UB II submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 30 April 1915 and launched on 21 August 1915. She was commissioned into the German Imperial Navy on 11 December 1915 as SM UB-18. The submarine sank 126 ships in 31 patrols for a total of 129,782 gross register tons (GRT) making her the 13th most successful U-boat in both world wars.UB-18 was rammed by the trawler Ben Lawer and sunk in the English Channel at 49°17′N 5°47′W / 49.283°N 5.783°W / 49.283; -5.783Coordinates: 49°17′N 5°47′W / 49.283°N 5.783°W / 49.283; -5.783 on 9 December 1917.

A German Type UB II submarine, ‘’UB-18’’ had a displacement of 263 tonnes (259 long tons) when at the surface and 292 tonnes (287 long tons) while submerged. They had a length overall of 36.13 m (118 ft 6 in), a beam of 4.54 m (14 ft 11 in), and a draught of 3.70 m (12 ft 2 in). The submarine was powered by two Daimler six-cylinder four-stroke diesel engines each producing 142 metric horsepower (104 kW; 140 shp) (a total of 284 metric horsepower (209 kW; 280 shp)), two Siemens-Schuckert electric motors producing 280 metric horsepower (210 kW; 280 shp), and one propeller shaft. She had a dive time of 45 seconds and was capable of operating at a depth of 50 metres (160 ft).