SM UC-40

History
German Empire
Name	UC-40
Ordered	20 November 1915
Builder	AG Vulcan, Hamburg
Yard number	73
Launched	5 September 1916
Commissioned	1 October 1916
Fate	Sank while on way to surrender, 21 January 1919
General characteristics
Class & type	Type UC II submarine
Displacement	400 t (390 long tons), surfaced; 480 t (470 long tons), submerged;
Length	49.45 m (162 ft 3 in) o/a; 40.30 m (132 ft 3 in) pressure hull;
Beam	5.22 m (17 ft 2 in) o/a; 3.65 m (12 ft) pressure hull;
Draught	3.68 m (12 ft 1 in)
Propulsion	2 × propeller shafts; 2 × 6-cylinder, 4-stroke diesel engines, 520 PS (380 kW; 510 shp); 2 × electric motors, 460 PS (340 kW; 450 shp);
Speed	11.7 knots (21.7 km/h; 13.5 mph), surfaced; 6.7 knots (12.4 km/h; 7.7 mph), submerged;
Range	9,410 nmi (17,430 km; 10,830 mi) at 7 knots (13 km/h; 8.1 mph) surfaced; 60 nmi (110 km; 69 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	50 m (160 ft)
Complement	26
Armament	6 × 100 cm (39.4 in) mine tubes; 18 × UC 200 mines; 3 × 50 cm (19.7 in) torpedo tubes (2 bow/external; one stern); 7 × torpedoes; 1 × 8.8 cm (3.5 in) Uk L/30 deck gun;
Notes	48-second diving time
Service record
Part of:	I Flotilla; 15 December 1916 – 24 September 1918; Flandern I Flotilla; 24 September – 11 October 1918; I Flotilla; 11 October – 11 November 1918;
Commanders:	Oblt.z.S. Gustav Deuerlich; 1 October 1916 – 15 August 1917; Oblt.z.S. / Kptlt. Hermann Menzel; 16 August 1917 – 7 August 1918; Lt.z.S. Bernhard Wischhausen; 9 August – 11 November 1918;
Operations:	17 patrols
Victories:	24 merchant ships sunk ; (39,698 GRT); 6 auxiliary warships sunk ; (3,149 GRT); 7 merchant ships damaged ; (25,876 GRT); 1 warship damaged ; (1,300 tons);

SM UC-40 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 20 November 1915 and was launched on 5 September 1916. She was commissioned into the German Imperial Navy on 1 October 1916 as SM UC-40. In 17 patrols UC-40 was credited with sinking 30 ships, either by torpedo or by mines laid. UC-40 was being taken to surrender but foundered in the North Sea en route on 21 January 1919.

History

German Empire
Name	UC-40
Ordered	20 November 1915
Builder	AG Vulcan, Hamburg
Yard number	73
Launched	5 September 1916
Commissioned	1 October 1916
Fate	Sank while on way to surrender, 21 January 1919
General characteristics
Class & type	Type UC II submarine
Displacement	400 t (390 long tons), surfaced 480 t (470 long tons), submerged
Length	49.45 m (162 ft 3 in) o/a 40.30 m (132 ft 3 in) pressure hull
Beam	5.22 m (17 ft 2 in) o/a 3.65 m (12 ft) pressure hull
Draught	3.68 m (12 ft 1 in)
Propulsion	2 × propeller shafts 2 × 6-cylinder, 4-stroke diesel engines, 520 PS (380 kW; 510 shp) 2 × electric motors, 460 PS (340 kW; 450 shp)
Speed	11.7 knots (21.7 km/h; 13.5 mph), surfaced 6.7 knots (12.4 km/h; 7.7 mph), submerged
Range	9,410 nmi (17,430 km; 10,830 mi) at 7 knots (13 km/h; 8.1 mph) surfaced 60 nmi (110 km; 69 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 m (160 ft)
Complement	26
Armament	6 × 100 cm (39.4 in) mine tubes 18 × UC 200 mines 3 × 50 cm (19.7 in) torpedo tubes (2 bow/external; one stern) 7 × torpedoes 1 × 8.8 cm (3.5 in) Uk L/30 deck gun
Notes	48-second diving time
Service record
Part of:	I Flotilla 15 December 1916 – 24 September 1918 Flandern I Flotilla 24 September – 11 October 1918 I Flotilla 11 October – 11 November 1918
Commanders:	Oblt.z.S. Gustav Deuerlich 1 October 1916 – 15 August 1917 Oblt.z.S. / Kptlt. Hermann Menzel 16 August 1917 – 7 August 1918 Lt.z.S. Bernhard Wischhausen 9 August – 11 November 1918
Operations:	17 patrols
Victories:	24 merchant ships sunk (39,698 GRT) 6 auxiliary warships sunk (3,149 GRT) 7 merchant ships damaged (25,876 GRT) 1 warship damaged (1,300 tons)