SM UB-73

	UB-148 at sea, a U-boat similar to UB-73.
History
German Empire
Name	UB-73
Ordered	23 September 1916
Builder	AG Vulcan, Hamburg
Cost	3,337,000 German Papiermark
Yard number	97
Launched	11 August 1917
Commissioned	2 October 1917
Fate	Surrendered to the French on 21 November 1918, broken up at Brest July 1921.
General characteristics
Class & type	Type UB III submarine
Displacement	508 t (500 long tons) surfaced; 639 t (629 long tons) submerged;
Length	55.52 m (182 ft 2 in) (o/a)
Beam	5.76 m (18 ft 11 in)
Draught	3.70 m (12 ft 2 in)
Propulsion	2 × propeller shaft; 2 × Körting four-stroke 6-cylinder diesel engines, 1,050 bhp (780 kW); 2 × Siemens-Schuckert electric motors, 780 shp (580 kW);
Speed	13.4 knots (24.8 km/h; 15.4 mph) surfaced; 7.5 knots (13.9 km/h; 8.6 mph) submerged;
Range	8,420 nmi (15,590 km; 9,690 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:	V Flotilla; 30 November 1917 – 2 May 1918; I Flotilla; 2 May – 11 November 1918;
Commanders:	Kptlt. Woldemar Adam; 2 October 1917 – 28 February 1918; Kptlt. Karl Neureuther; 1 March – 7 July 1918; Kptlt. Max Bräutigam; 8 July – 11 November 1918;
Operations:	6 patrols
Victories:	8 merchant ships sunk ; (18,806 GRT); 1 warship sunk ; (495 tons);

SM UB-73 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 2 October 1917 as SM UB-73.

UB-73 was serving in the Mediterranean. On 21 November 1918 she was surrendered to France as required by the regulations of the Armistice with Germany.

History
UB-148 at sea, a U-boat similar to UB-73.
German Empire
Name	UB-73
Ordered	23 September 1916
Builder	AG Vulcan, Hamburg
Cost	3,337,000 German Papiermark
Yard number	97
Launched	11 August 1917
Commissioned	2 October 1917
Fate	Surrendered to the French on 21 November 1918, broken up at Brest July 1921.
General characteristics
Class & type	Type UB III submarine
Displacement	508 t (500 long tons) surfaced 639 t (629 long tons) submerged
Length	55.52 m (182 ft 2 in) (o/a)
Beam	5.76 m (18 ft 11 in)
Draught	3.70 m (12 ft 2 in)
Propulsion	2 × propeller shaft 2 × Körting four-stroke 6-cylinder diesel engines, 1,050 bhp (780 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.4 knots (24.8 km/h; 15.4 mph) surfaced 7.5 knots (13.9 km/h; 8.6 mph) submerged
Range	8,420 nmi (15,590 km; 9,690 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:	V Flotilla 30 November 1917 – 2 May 1918 I Flotilla 2 May – 11 November 1918
Commanders:	Kptlt. Woldemar Adam 2 October 1917 – 28 February 1918 Kptlt. Karl Neureuther 1 March – 7 July 1918 Kptlt. Max Bräutigam 8 July – 11 November 1918
Operations:	6 patrols
Victories:	8 merchant ships sunk (18,806 GRT) 1 warship sunk (495 tons)