INT 1 · Q 40
Mooring buoy
Buoys & beaconsCore
A mooring-buoy symbol marks permanent ground tackle rather than a navigation mark.
What it means
The buoy body with a ring or mooring attachment identifies a permanent mooring. Imray uses a separate magenta visitor-mooring service symbol on large-scale plans.
Why it matters
Do not anchor close to moorings: chains, sinkers, and risers occupy more seabed than the surface buoy suggests.