SM UB-66

	UB-148 at sea, a U-boat similar to UB-66.
History
German Empire
Name	UB-66
Ordered	20 May 1916
Builder	Friedrich Krupp Germaniawerft, Kiel
Cost	3,276,000 German Papiermark
Yard number	284
Launched	31 May 1917
Commissioned	1 August 1917
Fate	Missing in the eastern Mediterranean after 17 January 1918
General characteristics
Class & type	Type UB III submarine
Displacement	513 t (505 long tons) surfaced; 647 t (637 long tons) submerged;
Length	55.83 m (183 ft 2 in) (o/a)
Beam	5.80 m (19 ft)
Draught	3.67 m (12 ft)
Propulsion	2 × propeller shaft; 2 × MAN four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW); 2 × Siemens-Schuckert electric motors, 780 shp (580 kW);
Speed	13.2 knots (24.4 km/h; 15.2 mph) surfaced; 7.6 knots (14.1 km/h; 8.7 mph) submerged;
Range	9,090 nmi (16,830 km; 10,460 mi) at 6 knots (11 km/h; 6.9 mph) surfaced; 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	50 m (160 ft)
Complement	3 officers, 31 men
Armament	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern); 10 torpedoes; 1 × 8.8 cm (3.46 in) deck gun;
Service record
Part of:	Constantinople Flotilla; 28 October 1917 – 18 January 1918;
Commanders:	Kptlt. Fritz Wernicke; 1 August 1917 – 18 January 1918;
Operations:	2 patrols
Victories:	2 merchant ships sunk ; (4,105 GRT)

SM UB-66 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 1 August 1917 as SM UB-66.

UB-66 went missing in the Eastern Mediterranean after 17 January 1918.

History
UB-148 at sea, a U-boat similar to UB-66.
German Empire
Name	UB-66
Ordered	20 May 1916
Builder	Friedrich Krupp Germaniawerft, Kiel
Cost	3,276,000 German Papiermark
Yard number	284
Launched	31 May 1917
Commissioned	1 August 1917
Fate	Missing in the eastern Mediterranean after 17 January 1918
General characteristics
Class & type	Type UB III submarine
Displacement	513 t (505 long tons) surfaced 647 t (637 long tons) submerged
Length	55.83 m (183 ft 2 in) (o/a)
Beam	5.80 m (19 ft)
Draught	3.67 m (12 ft)
Propulsion	2 × propeller shaft 2 × MAN four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.2 knots (24.4 km/h; 15.2 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range	9,090 nmi (16,830 km; 10,460 mi) at 6 knots (11 km/h; 6.9 mph) surfaced 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 m (160 ft)
Complement	3 officers, 31 men
Armament	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) 10 torpedoes 1 × 8.8 cm (3.46 in) deck gun
Service record
Part of:	Constantinople Flotilla 28 October 1917 – 18 January 1918
Commanders:	Kptlt. Fritz Wernicke 1 August 1917 – 18 January 1918
Operations:	2 patrols
Victories:	2 merchant ships sunk (4,105 GRT)