History | |
---|---|
Germany | |
Name |
|
Owner | C Andersen |
Operator | Kriegsmarine |
Port of registry | Hamburg |
Builder | Norderwerft, Hamburg |
Yard number | 721 |
Completed | May 1939 |
Identification |
|
Fate | Sunk by mine, 1940 |
General characteristics | |
Type | fishing trawler |
Tonnage | 523 GRT, 198 NRT |
Length | 178.0 ft (54.3 m) |
Beam | 27.6 ft (8.4 m) |
Depth | 13.5 ft (4.1 m) |
Installed power |
|
Propulsion | 1 × shaft; 1 × screw |
Speed | 12 knots (22 km/h) |
Sensors and processing systems |
|
Notes | sister ship: Uwe |
UJ-121 Jochen was a steam trawler that was built in Germany in 1939, and converted into a submarine chaser at the beginning of the Second World War. A mine sank her in the North Sea in 1940, with the loss of 13 of her crew.
In 1938–39 Norderwerft Köser & Meyer in Steinwerder, Hamburg built a pair of trawlers for the fishing fleet of C Andersen. The first was built as yard number 720, and launched on 29 January 1939 as Uwe. [1] Her sister ship was built as yard number 721; launched as Jochen; and completed that May. [2]
Jochen's registered length was 178.0 ft (54.3 m); her beam was 27.6 ft (8.4 m); and her depth was 13.5 ft (4.1 m). Her tonnages were 523 GRT and 198 NRT. She had a cruiser stern, and a single screw. She was equipped with wireless direction finding, and an echo sounding device. [3]
Deutsche Schiff- und Maschinenbau (DeSchiMAG) built her engines in its Seebeck works at Wesermünde in Bremerhaven. Her main engine was a three-cylinder triple-expansion engine. It was supplemented by an exhaust steam turbine, which drove the same propeller shaft via DeSchiMAG's patent Bauer-Wach system of a Föttinger fluid coupling and double-reduction gearing. The combined power of her reciprocating engine plus exhaust turbine was rated at 132 NHP, [3] and gave her a speed of 12 knots (22 km/h). [4]
Andersen registered Jochen at Hamburg. [3] Her port letter and number were HH 255, [2] and her wireless telegraph call sign was DKAL. [3]
The Kriegsmarine requisitioned Jochen shortly before the Second World War. She was converted into a submarine chaser, and on 28 July 1939 she was commissioned with the pennant number UJ-121. She joined the 12. U-Bootsjagdflottille ("12th Submarine Chaser Flotilla"), which was formed in September 1939 at Wilhelmshaven. [2]
On 2 September 1940, UJ-121 Jochen was approaching Ostend in German-occupied Belgium when she struck a mine. She sank, and 13 members of her crew were killed. [4] Her wreck blocked the channel that was used by the 2. Schnellbootflottille ("Second E-boat Flotilla"). [5]
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