ADMIRALTY Sailing Directions NP33 Philippine Islands, 7th Edition, 2021.

The Northern and North-Eastern Coasts of Borneo to the Sabah/Indonesian border; the Philippine Islands (except for the Western Coasts of Palawan and Luzon, between Cape Buliluyan and Cape Bojeador; and the Northern Coast of Luzon, between Cape Bojeador and Siniguian Point), Sulu Sea and Sulu Archipelago.

Updated to NM Week 42/20 (15/10/20) First updates in NM week 05/21. Edition 6 (2017) is cancelled.

Republished at approximately 3 yearly intervals.