Andy
It is MGN 280 that you want:
https://mcanet.mcga.gov.uk/public/c4...%20Annex_1.pdf
In case the link doesn't work ...
1. MCA web site
2. Guidance and Regulation
3. Marine Guidance Notes
4. Scroll down almost to the bottom
5. Sit down with a few beers - it is 148 pages long!
HTH
Mike
PEVERIL MYTH