COLREGS

The Convention on the International Regulations for Preventing Collisions at Sea (COLREGS) was adopted by IMO in 1972 and entered into force in 1977. The 38 rules and four annexes govern lights, shapes, sound signals, and conduct of vessels in all visibility conditions. Key rules include Rule 5 (look-out), Rule 6 (safe speed), Rule 7 (risk of collision), Rule 8 (action to avoid collision), and Rule 10 (traffic separation schemes). COLREGS apply to all vessels on the high seas and connected navigable waters.