SM UB-52

UB-148 at sea, a U-boat similar to UB-52.
History
German Empire
Name:	UB-52
Ordered:	20 May 1916
Builder:	Blohm & Voss, Hamburg
Cost:	3,276,000 German Papiermark
Yard number:	297
Launched:	8 March 1917
Commissioned:	9 August 1917
Fate:	sunk 23 May 1918 at 41°36′N 18°52′E / 41.600°N 18.867°E / 41.600; 18.867Coordinates: 41°36′N 18°52′E / 41.600°N 18.867°E / 41.600; 18.867 by HMS H4, all hands lost
General characteristics
Class and type:	German Type UB III submarine
Displacement:	516 t (508 long tons) surfaced 651 t (641 long tons) submerged
Length:	55.30 m (181 ft 5 in) (o/a)
Beam:	5.80 m (19 ft)
Draught:	3.68 m (12 ft 1 in)
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:	13.6 knots (25.2 km/h; 15.7 mph) surfaced 8 knots (15 km/h; 9.2 mph) submerged
Range:	9,040 nmi (16,740 km; 10,400 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:	Pola/Mittelmeer I Flotilla 13 October 1917 – 23 May 1918
Commanders:	Oblt.z.S. Otto Launburg 9 August 1917 – 23 May 1918
Operations:	4 patrols
Victories:	12 merchant ships sunk (41,411 GRT) 5 merchant ships damaged (27,076 GRT)

SM UB-52 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 Pola Flotilla of the German Imperial Navy on 9 August 1917 as SM UB-52.

She operated as part of the Pola Flotilla based in Cattaro. UB-52 was sunk on 23 May 1918 at 41°36′N 18°52′E / 41.600°N 18.867°E / 41.600; 18.867 by HMS H4, all hands lost.

UB-52 was ordered by the GIN on 20 May 1916. She was built by Blohm & Voss, Hamburg and following just under a year of construction, launched at Hamburg on 8 March 1917. UB-52 was commissioned later that same year under the command of Oblt.z.S. Otto Launburg.

Like all Type UB III submarines, UB-52 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-52 would carry a crew of up to 3 officer and 31 men and had a cruising range of 9,040 nautical miles (16,740 km; 10,400 mi). UB-52 had a displacement of 516 t (508 long tons) while surfaced and 651 t (641 long tons) when submerged. Her engines enabled her to travel at 13.6 knots (25.2 km/h; 15.7 mph) when surfaced and 8 knots (15 km/h; 9.2 mph) when submerged.