SM UB-125
 UB-148 at sea, a U-boat similar to UB-125. | |
| Career (German Empire) |  |
|---|---|
| Name: | UB-125 |
| Ordered: | 6/8 February 1917[1] |
| Builder: | AG Weser, Bremen[2] |
| Cost: | 3,654,000 German Papiermark[2] |
| Yard number: | 298[2] |
| Launched: | 16 April 1918[3] |
| Commissioned: | 18 May 1918[3] |
| Fate: | Surrendered 20 November 1918.[3] |
| Career (Japan) |  |
| Name: | O 6 |
| Commissioned: | 1920[3] |
| Decommissioned: | 1921[3] |
| Fate: | broken up in Kure.[3] |
| General characteristics | |
| Class and type: | German Type UB III submarine |
| Type: | Coastal submarine |
| Displacement: | 512 t (504 long tons; 564 short tons) surfaced 643 t (633 long tons; 709 short tons) submerged[2] |
| Length: | 55.85 m (183.2 ft) o/a[2] |
| Beam: | 5.8 m (19 ft)[2] |
| Draught: | 3.72 m (12.2 ft)[2] |
| Propulsion: | 2 shafts 6-cylinder Körting diesel engines,[4] 1,060 ihp (790 kW) Siemens-Schuckert[4] electric motors, 788 ihp (588 kW)[2] |
| Speed: | 13.9 knots (25.7 km/h; 16.0 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged[2] |
| Range: | 7,280 nmi (13,480 km; 8,380 mi) at 6 kn (11 km/h; 6.9 mph) surfaced 55 nmi (102 km; 63 mi) at 4 kn (7.4 km/h; 4.6 mph) submerged[2] |
| Test depth: | 50 m (160 ft)[4] |
| Complement: | 3 officers, 31 men[4] |
| Armament: | • 5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) with 10 torpedoes • 1 × 10.5 cm (4.13 in) deck gun[4] |
| Service record | |
|---|---|
| Part of: |
III Flotilla 21 Jul 1918 - 11 Nov 1918 |
| Commanders: |
Kptlt Fritz Schubert[5] 18 May 1918 – 20 Jul 1918 Oblt Werner Vater[6] 21 Jul 1918 – 11 Nov 1918 |
| Operations: | 2 patrols |
| Victories: |
6 merchant ships sunk (13,307 GRT) 1 merchant ship damaged (6,082 GRT) |
SM UB-125 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 18 May 1918 as SM UB-125.[nb 1]
UB-125 was surrendered 20 November 1918 in accordance with the requirements of the Armistice with Germany. Handed over to Japan, she served as O 6 in the Imperial Japanese Navy until 1921 when she was broken up in Kure.[3]
Construction
She was built by AG Weser of Bremen[2] and following just under a year of construction, launched at Bremen on 16 April 1918. UB-125 was commissioned later the same year under the command of Kptlt Fritz Schubert. Like all Type UB III submarines, UB-125 carried 10 torpedoes and was armed with a 10.5 cm (4.13 in) deck gun. UB-125 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7,280 nautical miles (13,480 km).[2] UB-125 had a displacement of 512 t (504 long tons; 564 short tons) while surfaced and 643 t (633 long tons; 709 short tons) when submerged. Her engines enabled her to travel at 13.9 knots (25.7 km/h; 16.0 mph) when surfaced and 7.6 knots (14.1 km/h; 8.7 mph) when submerged.[2]
Summary of Raiding Career
| Date | Name | Nationality | Tonnage (GRT) |
Fate[7] |
|---|---|---|---|---|
| 29 August 1918 | Atxeri Mendi |  Spain |
2,424 | Sunk |
| 30 August 1918 | Onega |  United States |
3,636 | Sunk |
| 1 September 1918 | Actor |  United Kingdom |
6,082 | Damaged |
| 3 September 1918 | Brava |  Portugal |
3,184 | Sunk |
| 3 September 1918 | Lake Owens | United States |
2,308 | Sunk |
| 4 September 1918 | Bogstad |  Norway |
1,589 | Sunk |
| 12 September 1918 | Skjold |  Denmark |
166 | Sunk |
Notes
- Footnotes
- ↑ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Citations
- ↑ Rössler 1979, p. 55.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 Gröner 1985, p. 52.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Gröner 1985, p. 55.
- ↑ 4.0 4.1 4.2 4.3 4.4 Gröner 1985, p. 53.
- ↑ "Fritz Schubert". Uboat.net. Retrieved 11 March 2015.
- ↑ "Werner Vater". Uboat.net. Retrieved 11 March 2015.
- ↑ "SM UB-125 successes". UBoat.net. Retrieved 11 March 2015.
References
- Gröner, Erich (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe, 1815-1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4.
- Bendert, Harald (2000). Die UB-Boote der Kaiserlichen Marine, 1914-1918. Einsätze, Erfolge, Schicksal (in German). Hamburg: Verlag E.S. Mittler & Sohn GmbH. ISBN 3-8132-0713-7.
- Rössler, Eberhard (1979). U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 - 1945. Die deutschen U-Boote und ihre Werften (in German) I (Munich: Bernard & Graefe). ISBN 3-7637-5213-7.