Porta (ship, 1922)
 The porta before the renovation
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The Porta des Norddeutscher Lloyd (NDL), completed in 1922, belonged to the Minden class completed by AG Vulcan in Stettin . Five ships were built for the NDL, three more for the subsidiary Roland-Linie . The Porta was the first turbine-powered NDL ship.
In 1939 she was one of the ships of the class that was extended and received a new turbine system. The Porta survived the Second World War and was delivered to the Netherlands. The NDL bought back its former ship in 1955 and got it back on the road as Trierstein . In 1961 it was sold to Panama and scrapped in Hong Kong in 1964.
Mission history
The Minden class was the first type of cargo ship that the NDL purchased after the First World War. Three ships of the class received conventional propulsion with a triple expansion engine . The other two ships were the first ships of the NDL with steam turbine or diesel propulsion . The three for the subsidiary Roland-Linie were of the basic type and the Roland was the first ship of the class to be completed in Stettin in October 1921. The ships of the NDL were to be used primarily to Brazil, those of the Roland line to the west coast of South America.
The after Porta Westfalica called Porta took the name of a 1919 completed and delivered to the United Kingdom East Asia freighter of Remscheid on class, which in 1927 still as lip came in the service of NDL. The Porta , manufactured by the Stettiner Vulcan under construction number 649, was launched on December 1, 1921 as the fourth ship of the class and was delivered on April 11 as the second NDL ship after the Minden .
She was the first turbine ship of the NDL because, unlike the three ships of the class completed before her, she was equipped with a geared turbine set manufactured by the shipyard. This only had an output of 1660 HPw compared to the 1800 HP of the other ships and enabled a service speed of 10.5 knots.
The Porta was used in the South American service and ran both to the east and west coast during its service. After the merger with the Roland-Linie at the turn of the year 1925/1926, the NDL had eight units of this type, of which only the NDL's first motor ship, the Erfurt , differed externally, as it did not have a large chimney based on the Danish model.
In November 1934, the sister ships Nienburg and Atto of the Hamburg-Bremen Africa Line (HBAL) were made available. In 1935 the Eisenach (2) collided with the British battleship Ramillies and was badly damaged and sold to Bulgaria after being repaired. The existing ships were reclassified to passenger ships after the establishment of a 13th cabin space. At the end of the year, the two ships used by HBAL were withdrawn and the Atto handed over to the German Levante Line . On May 27, 1936, the two former Roland ships ( Roland , Alda ) with Hameln and Eisenach (3) also received city names.
In future, all ships of the class were to be used on the newly created cross-trade services of the NDL between South America and South Africa or between the Gulf ports of the USA and Australia or South America. The steam ships should be modernized for this. In addition to lengthening the ships with a sweeping bow, new AEG geared turbines were installed, which made a speed of 14.5 kn possible.
The porta was rebuilt after the pattern of the other ships as the fifth ship from 1939 in Danzig. The new forecastle made it 124.2 m long, measured at 4341 GRT and had a load capacity of 7400 tdw. The new machines and boilers developed 4200 PSw and made the 14.5 knots possible. However, the ship was only finished after the outbreak of war.
The ship survived the Second World War.
Post war history
In August 1946 the repaired ship was delivered to the Netherlands, where it was used as Walcheren for two shipping companies. The shipping company FA Vinnen in Bremen acquired the ship in May 1950 . After overhaul in the technical operation of the NDL and reduction of the propulsion power to 2850 HP, which allowed a speed of 13 knots, the shipping company used the ship as Adolf Vinnen .
The NDL chartered its former ship for the first voyage of a Lloyd ship to Central America. In February 1955, the NDL bought the ship and renamed it Trierstein . It was used next to the sister ship Traunstein (ex Eisenach / Alda ), which was acquired by the NDL in 1951 from Spanish ownership. Until 1959, the owner of the sister ships was Roland-Linie Schiffahrts-GmbH, which chartered the ships to the NDL. This construction served to defend against claims from old foreign liabilities, especially when calling at US ports.
In September 1961 it was then sold to Panama, where it was named Amonea and remained in service until 1963 before being sold to Hong Kong for scrapping, where it arrived in January 1964.
The Minden- class ships
| Launched in service |
Surname | tonnage | B.No. | fate |
| 10.01.1921 11.25.1921 |
Minden | 4165 GRT | 648 | 1939 Conversion at the Deutsche Werft , Hamburg, (4301 GRT, 14.5 kn), sunk on September 24, 1939 near the Faroe Islands by British cruisers |
| 03/25/1922 06/02/1922 |
Nienburg (2) | 4154 GRT | 651 | 1934/1935 HBAL, 1938 conversion at the Deutsche Werft (4,318 GRT, 14.5 kn), laid up in Buenos Aires on April 8, 1940 , then sold to Argentina: Belgrano , from 1943 Rio Juramento , 1963 Giuseppe , scrapped in 1965 |
| 20.07.1922 06.10.1922 |
Eisenach (2) | 4159 GRT | 652 | Sold to Bulgaria on October 31, 1935: Rodina sunk off Burgas on September 19, 1941 after being hit by a mine |
| 03.1923 06.1923 |
Erfurt (2) | 4201 GRT | 653 | First motor ship of the NDL, extended after a mine hit in 1944 at the Danzig shipyard and equipped with a more powerful engine system (4700 instead of 1800 hp), sank on March 20, 1944 after another mine hit in the Baltic Sea |
| 07.1921 .10.1921 |
Roland (3) Hamelin (2) |
4174 GRT | 646 | 1921 Roland line 1926 NDL, renamed in 1936, 1939 conversion to the AG Weser (4351 BRT), September 1939 Veracruz launched, seized in May 1942 Mexico: Oaxaca , July 26, 1942 U 171 sunk |
| 1921 1921 |
Alda Eisenach (3) Traunstein |
4177 GRT | 647 | 1921 Rolandlinie, 1926 NDL, renamed in 1936, 1939 reconstruction on the AG Weser (4423 BRT), launched in September 1939 in Puntarenas , Costa Rica , sunk in March 1941, raised, 1942 Oceanica , sold to Spain, 1943 Ultramarino , 1951 again NDL, Scrapped in 1960 |
| 02/1922 05/05/1922 |
Atto Adana |
4176 GRT | 650 | 1922 Rolandlinie, 1926 NDL, 1934/1935 HBAL, 1935 DLL, renamed in 1936, laid up in Cagliari in September 1939 , sunk off Libya by British destroyers on April 16, 1941 |
literature
- Arnold Kludas : The ships of the North German Lloyd 1920 to 1970 . Koehlers Verlagsgesellschaft, Herford 1992, ISBN 3-7822-0534-0 .
- Susanne and Klaus Wiborg: 1847–1997 Our field is the world , Hapag-Lloyd AG, 1997