Definition
Admiralty Distance Tables, published in three volumes as NP 350, give the shortest practicable navigable distance in nautical miles between principal ports, routed through junction points and around continents and through canals rather than as straight great circles. Volume 1 covers the Atlantic and Mediterranean, Volume 2 the Indian Ocean and adjacent seas, Volume 3 the Pacific. They are used for voyage estimating, fuel and provisioning calculations and charter party distance disputes.
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