Rule 1 - Application COLREGS

Rule (a) Where they apply?

All vessels upon the high seas and in all waters connected there with navigable by seagoing vessels

Rule (b) Local Rules

Harbours, rivers, lakes, etc, can have special local rules. These rules should follow COLREGS as closely as possible.

Rule ( c ) Special Vehicles

The government can make extra rules for things like;

Warships

Vessels in convoy

Fishing vessels in fleets

Rule (d) Traffic separation scheme

The IMO can establish traffic separation schemes (TSS)

Rule (e) Specially designed vessels

If a vessel cannot physically comply with certain requirements because of it’s special construction/purpose, it’s government can approve alternative arrangements that comply as closely as possible.