SS Heidberg

History
Name	1943: Heidberg 1945: Empire Convention 1946: Ernst Thaelmann
Namesake	1946: Ernst Thälmann
Owner	1943: Aug. Bolten Wm. Miller’s Nachfolger 1945: Ministry of War Transport 1945: Ministry of Transport 1946: USSR
Operator	1945: Ellerman's Wilson Line
Port of registry	1943: Hamburg 1945: London 1946:
Builder	Helsingborgs Varfs A/B
Launched	6 March 1943
Completed	1943
Identification	UK official number 180342 call sign GMFM
Fate	deleted from registers, 1970
General characteristics
Tonnage	1,714 GRT, 847 NRT
Length	277.6 ft (84.6 m)
Beam	41.4 ft (12.6 m)
Depth	16.2 ft (4.9 m)
Decks	2
Propulsion	1 × screw 1 × triple expansion engine, exhaust steam turbine & steam compressor
Sensors and processing systems	wireless direction finding echo sounding device

SS Heidberg was a cargo steamship that was built in 1943 in Sweden for a German shipping company. The Allies in 1945 took it for war reparations. She was renamed Empire Convention, and spent about nine months under United Kingdom ownership and management. In 1946 she was transferred to the Soviet Union, who renamed her Эрнст Те́льман – Ernst Thälmann. Her fate is not recorded.

Building

Helsingborgs Varfs AB [sv] built Heidberg in Helsingborg,[1] and launched her on 6 March 1943.^[citation needed] Her registered length was 277.6 ft (84.6 m), her beam was 41.4 ft (12.6 m), and her depth was 16.2 ft (4.9 m). Her tonnages were 1,714 GRT and 847 NRT.[1]

She had a single screw, driven by a Helsingborgs Varfs three-cylinder triple expansion engine. Steam from its low-pressure cylinder drove an exhaust steam turbine, which powered a compressor.[1] The compressor increased the pressure of steam exhausted from the high-pressure cylinder before it entered the intermediate-pressure cylinder. The pressure also increased the temperature of the steam. This reduced condensation in the intermediate- and low-pressure cylinders, increasing the engine's fuel efficiency and power.[2]

Heidberg and Empire Convention

Heidberg's first owner was Aug. Bolten Wm. Miller’s Nachfolger [de], who registered her in Hamburg. After the German surrender in 1945, Allied forces seized her at Szczecin.

The UK Ministry of War Transport took her over, renamed her Empire Convention, and registered her in London. Her UK official number 180342 and her call sign was GMFM. The MoWT appointed Ellerman's Wilson Line to manage her.[1]

Ernst Thaelmann

Empire Convention was one of a number of ships that the UK transferred to the Soviet Union in February 1946 under the Potsdam Agreement.[3] The Soviet Union renamed her after Ernst Thälmann,[4] who had led the Communist Party of Germany until 1933, and had been executed in Buchenwald concentration camp in 1944.

Ernst Thaelmann became part of the Sakhalin Shipping Company fleet in the Soviet Far East.[5][6] Lloyd's Register still recorded the ship as extant in 1959.[7] She was deleted from international shipping registers in 1970.^[citation needed]

References

1. Lloyds Register 1945, E.
2. Hardy 1954, pp. 244–245.
3. "Enemy Ships for Russia". The Times. No. 50376. London. 14 February 1946. col C, p. 2.
4. Lloyds Register 1946, ERN.
5. Mitchell & Sawyer 1995^[page needed]
6. "МОРФЛОТ » Морской флот СССР. Суда ММФ СССЗ. » Морские Пароходства » Портал: Сахалинское Морское Пароходство" (in Russian). Archived from the original on 2 June 2016.
7. Lloyds Register 1959, Ernest Holt.

Bibliography

• Hardy, AC (1954) [1948]. Modern Marine Engineering. Vol. I (revised ed.). London: Caxton Publishing.
• "Supplement to the Register". Lloyd's Register of Shipping (PDF). Vol. I–Steamers and Motorships of 300 tons gross and over. London: Lloyd's Register of Shipping. 1945 – via Southampton City Council.
• "Steamers and Motorships". Lloyd's Register of Shipping. London: Lloyd's Register of Shipping. 1946 – via Internet Archive.
• Lloyd's Register of Shipping. London: Lloyd's Register of Shipping. 1959 – via Internet Archive.
• Mitchell, WH; Sawyer, LA (1995). The Empire Ships. London, New York, Hamburg, Hong Kong: Lloyd's of London Press Ltd. ISBN 1-85044-275-4.