This publication Admiralty Distance Tables - Indian Ocean (NP 350-2) is in the British Admiralty Distance Tables series. It covers the Indian Ocean and part of the Southern Ocean from South Africa to New Zealand, Red Sea, Persian Gulf, and Malay Archipelago.
This publication is in continuous revision.
The Admiralty Distance Tables are a three part series of tables, sub-divided by region, giving the shortest distances between ports. There are supporting diagrams and text as well as link tables for places not in the same or adjacent table.