SM U-125
| History | |
|---|---|
 German Empire
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| 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 August 1931 U 125 was re-commissioned as Auxiliary Vessel No. 2900 and used until 1935. |
| General characteristics | |
| Class and type: | German Type UE II submarine |
| Type: | Coastal minelaying submarine |
| Displacement: |
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| Length: | 82.00 m (269 ft) (o/a) |
| Beam: | 7.42 m (24 ft 4 in) |
| Height: | 10.16 m (33 ft 4 in) |
| Draught: | 4.22 m (13 ft 10 in) |
| Installed power: |
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| Propulsion: | 2 shafts, 2 × 1.61 m (5 ft 3 in) propellers |
| Speed: |
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| Range: |
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| Test depth: | 75 m (246 ft) |
| Complement: | 4 officers, 36 enlisted |
| Armament: |
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| Service record | |
| Commanders: |
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| Operations: | None |
| Victories: | None |
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.
German 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. It had a total length of 269 ft (82 m), a beam of 24 ft 4 in (7.42 m), a height of 33 ft 4 in (10.16 m), and a draught of 13 ft 10 in (4.22 m). The submarine was powered by two 2,400 metric horsepower (1,800 kW; 2,400 shp) engines for use while surfaced, and two 1,235 metric horsepower (908 kW; 1,218 shp) engines for use while submerged. It had two shafts and two 1.61 m (5.3 ft) propellers. It was capable of operating at depths of up to 75 metres (246 ft).
The submarine had a maximum surface speed of 14.7 knots (27.2 km/h; 16.9 mph) and a maximum submerged speed of 7 knots (13 km/h; 8.1 mph). When submerged, it could operate for 35 nautical miles (65 km; 40 mi) at 4.5 knots (8.3 km/h; 5.2 mph); when surfaced, it could travel 11,470 nautical miles (21,240 km; 13,200 mi) at 8 knots (15 km/h; 9.2 mph). U-125 was fitted with four 50 centimetres (20 in) torpedo tubes (fitted at its bow), fourteen torpedoes, two 100 centimetres (39 in) mine chutes (fitted at its stern), forty-two mines, one 15 centimetres (5.9 in) deck machine gun, and 494 rounds. It had a complement of forty (thirty-six crew members and four officers).
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