IALA Maritime Buoyage System
This is the 7th (2012) edition of Maritime Buoyage System (NP 735) published by the British Admiralty.
This publication is in continuous revision.
The IALA Maritime Buoyage System describes the Cardinal and Lateral Buoyage system with diagrams and written explanations of the five types of marks: lateral, cardinal, isolated danger, safe water and special marks.
- United Kingdom Hydrographic Office