SS ''Heidberg'' was a

cargo In transportation, cargo refers to goods transported by land, water or air, while freight refers to its conveyance. In economics, freight refers to goods transported at a freight rate for commercial gain. The term cargo is also used in cas ...

steamship A steamship, often referred to as a steamer, is a type of steam-powered vessel, typically ocean-faring and seaworthy, that is propelled by one or more steam engines that typically move (turn) propellers or paddlewheels. The first steamships ...

that was built in 1943 in

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

for a

German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...

shipping company. The

Allies An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not an explicit agreement has been worked out among them. Members of an alliance are calle ...

in 1945 took it for

war reparations War reparations are compensation payments made after a war by one side to the other. They are intended to cover damage or injury inflicted during a war. War reparations can take the form of hard currency, precious metals, natural resources, in ...

. She was renamed ''Empire Convention'', and spent about nine months under

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

ownership and management. In 1946 she was transferred to the

Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

, who renamed her ''Эрнст Те́льман'' – ''Ernst Thälmann''. Her fate is not recorded.

Building

built ''Heidberg'' in

Helsingborg Helsingborg (, , ), is a Urban areas in Sweden, city and the seat of Helsingborg Municipality, Scania County, Scania (Skåne), Sweden. It is the second-largest city in Scania (after Malmö) and List of urban areas in Sweden by population, ninth ...

, and launched her on 6 March 1943. Her registered length was , her beam was , and her depth was . Her

tonnage Tonnage is a measure of the capacity of a ship, and is commonly used to assess fees on commercial shipping. The term derives from the taxation paid on '' tuns'' or casks of wine. In modern maritime usage, "tonnage" specifically refers to a cal ...

s were and . She had a single

screw A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force (torque) to the screw head, head. The most common uses of screws are to hold objects together and there are many forms for a variety ...

, driven by a Helsingborgs Varfs three-cylinder

triple expansion engine A steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can be transf ...

. Steam from its low-pressure cylinder drove an exhaust

steam turbine A steam turbine or steam turbine engine is a machine or heat engine that extracts thermal energy from pressurized steam and uses it to do mechanical work utilising a rotating output shaft. Its modern manifestation was invented by Sir Charles Par ...

, which powered a compressor. 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.

''Heidberg'' and ''Empire Convention''

''Heidberg''s first owner was , who

registered Registered may refer to: * Registered mail, letters, packets or other postal documents considered valuable and in need of a chain of custody * Registered trademark symbol, symbol ® that provides notice that the preceding is a trademark or service ...

her in

Hamburg Hamburg (, ; ), officially the Free and Hanseatic City of Hamburg,. is the List of cities in Germany by population, second-largest city in Germany after Berlin and List of cities in the European Union by population within city limits, 7th-lar ...

. After the

German surrender German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ger ...

in 1945, Allied forces seized her at

Szczecin Szczecin ( , , ; ; ; or ) is the capital city, capital and largest city of the West Pomeranian Voivodeship in northwestern Poland. Located near the Baltic Sea and the Poland-Germany border, German border, it is a major port, seaport, the la ...

. The UK

Ministry of War Transport The Ministry of War Transport (MoWT) was a department of the British Government formed early in the Second World War to control transportation policy and resources. It was formed by merging the Ministry of Shipping and the Ministry of Transpor ...

took her over, renamed her ''Empire Convention'', and registered her in

London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

. Her UK

official number Official numbers are ship identifier numbers assigned to merchant ships by their flag state, country of registration. Each country developed its own official numbering system, some on a national and some on a port-by-port basis, and the formats hav ...

180342 and her

call sign In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique identifier for a transmitter station. A call sign can be formally as ...

was GMFM. The MoWT appointed Ellerman's Wilson Line to manage her.

''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 The Potsdam Agreement () was the agreement among three of the Allies of World War II: the United Kingdom, the United States, and the Soviet Union after the war ended in Europe that was signed on 1 August 1945 and published the following day. A ...

. The Soviet Union renamed her after

Ernst Thälmann Ernst Johannes Fritz Thälmann (; 16 April 1886 – 18 August 1944) was a German communist politician and leader of the Communist Party of Germany (KPD) from 1925 to 1933. A committed communist, Thälmann sought to overthrow the liberal democr ...

, who had led the

Communist Party of Germany The Communist Party of Germany (, ; KPD ) was a major Far-left politics, far-left political party in the Weimar Republic during the interwar period, German resistance to Nazism, underground resistance movement in Nazi Germany, and minor party ...

until 1933, and had been executed in

Buchenwald concentration camp Buchenwald (; 'beech forest') was a German Nazi concentration camp established on Ettersberg hill near Weimar, Nazi Germany, Germany, in July 1937. It was one of the first and the largest of the concentration camps within the Altreich (pre-1938 ...

in 1944. ''Ernst Thaelmann'' became part of the

Sakhalin Shipping Company Sakhalin Shipping Company (SASCO) () is a shipping company which provides ice-class ferry, cargo, and tramp service in Eastern Russia and along the Northern Sea Route. Headquartered in Kholmsk, on Sakhalin's west coast, the company provides 2/3 of ...

fleet in the

Soviet Far East The Russian Far East ( rus, Дальний Восток России, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in North Asia. It is the easternmost part of Russia and the Asian continent, and is coextensive with the Far Eastern Fe ...

Lloyd's Register Lloyd's Register Group Limited, trading as Lloyd's Register (LR), is a technical and professional services organisation and a maritime classification society, wholly owned by the Lloyd’s Register Foundation, a UK charity dedicated to research ...

still recorded the ship as extant in 1959. She was deleted from international shipping registers in 1970.

References

Bibliography

* * * * * {{Empire ships 1943 ships Empire ships Germany–Soviet Union military relations Merchant ships of the Soviet Union Merchant ships of the United Kingdom Ministry of War Transport ships Ships built in Skåne County Soviet Union–United Kingdom military relations Steamships of Germany Steamships of the Soviet Union Steamships of the United Kingdom World War II merchant ships of Germany