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.

Design

Type UE II submarines were preceded by the shorter Type UE I submarines. U-125 had a displacement of 1,163 tonnes (1,145 long tons) when at the surface and 1,468 tonnes (1,445 long tons) while submerged. She had a total length of 82 metres (269ft), a beam of 7.42m (24ft 4in), a height of 10.16m (33ft 4in), and a draught of 4.22m (13ft 10in). The submarine was powered by two 2,400 metric horsepower (1,800kW; 2,400shp) engines for use while surfaced, and two 1,235 metric horsepower (908kW; 1,218shp) engines for use while submerged. She had two shafts and two 1.61m (5.3ft) propellers. She was capable of operating at depths of up to 75 metres (246ft).

The submarine had a maximum surface speed of 14.7 knots (27.2km/h; 16.9mph) and a maximum submerged speed of 7.2 knots (13.3km/h; 8.3mph). When submerged, she could operate for 35 nautical miles (65km; 40mi) at 4.5 knots (8.3km/h; 5.2mph); when surfaced, she could travel 11,470 nautical miles (21,240km; 13,200mi) at 8 knots (15km/h; 9.2mph). U-125 was fitted with four 50 centimetres (20in) torpedo tubes (fitted at its bow), twelve torpedoes, two 100 centimetres (39in) mine chutes (fitted at its stern), forty-two mines, one 15cm (5.9in) SK L/45 deck gun, and 494 rounds. She had a complement of forty (thirty-six crew members and four officers).

Service

Germany

Post-war

U-125 was surrendered to Japan on 26 November 1918 and was renamed O-1 in 1920 or 1921. She was dismantled at the Yokosuka Naval Arsenal between January and March 1921. Between March 1924 and January 1925, she was used as a floating jetty at the Kure KSubmarine School. In 1925, she was rebuilt at Yokosuka as testbed for submarine salvage operations carried out by the submarine tender Asahi. On 19 August 1931, the formerO-1 was recommissioned as Auxiliary Vessel No. 2900 and used as such until 1935.[citation needed]

Notes

Citations

Bibliography

  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol.2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN0-85177-593-4.