HNLMS Tankboot I
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 The former Dutch Tankboot 1 and former German Kärnten, here as the Soviet Polyarnik class replenishment tanker. | |
| History | |
|---|---|
   Netherlands | |
| Name | Tankboot 1 |
| Builder | C. Van der Giessen & Zonen, Krimpen a/d IJssel |
| Laid down | 14 December 1939 |
| Launched | 3 May 1941 |
| Commissioned | 27 October 1941 in German service |
| Out of service | 1987 or 1990 (Soviet service) |
| Renamed |
|
| Fate | Stricken in 1987 or 1990 depending on source |
| General characteristics | |
| Type | Auxiliary, tanker |
| Displacement | |
| Length | 132.1 m (433 ft 5 in) |
| Beam | 16.15 m (53 ft 0 in) |
| Draught | 7.5 m (24 ft 7 in) |
| Installed power | 7,000 hp (5,200 kW) |
| Propulsion | 2 × Werkspoor 4-stroke 8-cylinder diesel engines |
| Speed | |
| Armament |
|
| Aircraft carried | 1 as designed, 0 actual |
Tankboot 1 was the first Royal Netherlands Navy ordered tanker. Ships of the Royal Netherlands Navy had always been dependent on naval bases and commercial tankers that would be hired to support their operations, however, naval bases were not always nearby and commercial tankers had to be chartered weeks in advance, were too slow to keep up with a naval fleet, did not have proper equipment for refueling at sea, were unarmed and were very costly to hire. Because of these reasons the Royal Netherlands Navy decided they required their own tankers, fast enough to keep up with the fleet, armed well enough to be able to defend themselves and perhaps most importantly, available on short notice in case of an emergency.[1][2]
However, Tankboot 1 would never operate with the Dutch, being captured intact but unfinished on stocks at the fall of the Netherlands. The ship was instead completed and commissioned by the German Kriegsmarine. After the war's end, the ship was not returned to the Netherlands but was awarded to the Soviet Union as a war reprisal. The vessel continued to serve into the late 1980s.[1][3]