SM U-125

For other ships of the same name, see German submarine U-125.

SM U-125
Career (German Empire)
Name:	U-125
Ordered:	27 May 1916
Builder:	Blohm & Voss, Hamburg
Launched:	26 May 1918
Commissioned:	4 September 1918
Fate:	26 November 1918 - Surrendered to Japan. In Japanese service as the O1 1920-21. Dismantled at Yokosuka Navy Yard between January and March 1921. Between March 1924 and January 1925 she was used as a floating jetty at the Kure Submarine School. In 1925 she was rebuilt at Yokosuka as testbed for submarine salvage operations carried out by the tender ASAHI. On 19 Aug 1931 U 125 was re-commissioned as Auxiliary Vessel No. 2900 and used until 1935.
General characteristics
Type:	Type UE II minelayer submarine
Displacement:	1,164 long tons (1,183 t) surfaced 1,512 long tons (1,536 t) submerged
Length:	81.5 m (267 ft) o/a
Beam:	7.42 m (24.3 ft)
Draught:	4.22 m (13.8 ft)
Propulsion:	2 shafts 2 × diesel engines, 1,200 hp (895 kW) 2 × electric motors, 600 hp (447 kW)
Speed:	11.5 knots (21.3 km/h; 13.2 mph) surfaced 7 knots (13 km/h; 8.1 mph) submerged
Range:	12,500 mi (20,100 km) at 8 kn (15 km/h; 9.2 mph) surfaced 53 mi (85 km) at 4.5 kn (8.3 km/h; 5.2 mph) submerged
Test depth:	75 m (246 ft)
Complement:	4 officers 36 crew
Armament:	• 4 × 50 cm (19.7 in) internal bow torpedo tubes • 2 × internal stern tubes • 1 × 88 mm and 1 × 150 mm deck gun • 42 × mines

SM U-125 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-125 was engaged in the naval warfare and took part in the First Battle of the Atlantic.