1. 8 IALA Recommendations for the marking of offshore structures 1965 to 1984.
2. 7 IMO (1984). Ships' Routeing, 5th edn.
3. 10 NMI (1981). Collision risk estimates in the English Channel and Western Approaches, Report R 115.
4. 3 Final Act of the United Nations Conference on the Law of the Sea. (Geneva 1958.)
5. 4 United Nations Convention on the Law of the Sea, 1982.