For some ports there are some exceptions to the rules described above:
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* Faroer (Tórshavn) - is only supplied through Reykjavik and Helsingor (Denmark). The distances are calculated by the distance to Copenhagen plus 1870 km.
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* Svalbard (Longyearbyen) - is only supplied through Tromsø (Norway. The distances are calculated by the distance to Oslo + 1695 nautical miles.