NP79 - ADMIRALTY List of Lights and Fog Signals: Volume F for North-East Indian Ocean, Central Part of South China & Eastern Archipelagic Seas [North of the Equator], Excluding China, and South-West Part of Philippine Sea
NP286(4) - ADMIRALTY List of Radio Signals: Volume 6, Part 4 - Pilot Services, Vessel Traffic Services and Port Operations - Indian sub-continent, South East Asia and Australasia