International Regulations for Preventing Collisions at Sea
International Regulations for Preventing Collisions at Sea apply to all vessels upon the high seas and in all waters connected therewith navigable by seagoing vessels. More on International Regulations for Preventing Collisions at Sea
Give way, Do not impede
Vessel port side with one black cylinder raisedVessel contrained by its draught.Head on
Head onAlter course to StarboardGive Way
Vessel on starboard, potential collision.Vessel crossing from starboard side is stand-on vesselKeep to starboard side. Do not impede large vessels.
Narrow channelDo not anchor unless essential.Stand on
Vessel on port side, potential collisionVessel is crossing from port and should give way.Give Way
Vessel on starboard side with one black cylinder raisedVessel is constrained by draught.Give Way
Vessel on portside with Round/Diamond/Round shapes raisedVessel is restricted in its ability to manoeuver.Give Way
Vessel on portside with two round shapes raisedVessel is Not Under Command.Stay clear
Vessel on portside with Blue/White flag raisedDiver below. Stay well clear.Give Way
Vessel on portside with two inverted cones.Vessel is engaged in fishing.Give Way
Sailing vessel on starboard side.Power vessels gives way to sailing vessels.Give Way
Vessel on portside with two round shapes raised.Vessel is Not Under Command.Keep to starboard side of channel
Making way in narrow channel.Sound 1 long blast on horn.Sound horn
Narrow channel, planning to overtake on their starboard side.2 Long blasts and 1 Short blasts. Wait for response.Give Way
Vessel crossing from starboard side.Vessel from starboard side is stand-vessel.Give Way
Vessel on starboard side with Round/Diamond/Round shapes raised.Vessel is restricted in its ability to manoeuver.Give Way
Vessel on port side with one black cylinder raised.Vessel is constrained by draught.Stand-on
Sailing vessel on starboard side.Sailing vessels give way to vessels engaged in fishing.Keep clear
Vessel on portside side with one round ball raised.Vessel under anchor. Vessel less than 100 metres.Stand-on
Sailing vessel on portside with inverted cone.Sailing vessel under power. Vessels crossing on portside giveway.Keep clear, pass on vessels portside.
Vessel with obstruction over its starboard side.Vessel engaged in dredging. Restricted in ability to manoeuver. Obstacle on its starboard side. Pass on its portside.Give Way.
Vessel on starboard side with two round shapes raised.Vessel is Not Under Command.Give Way.
Vessel on ahead with two inverted cones raised plus 1 cone on the stern.Vessel enganged in fishing with gear extending more than 150 from vessel.Keep clear.
Vessel with three round shapes raised.Vessel is aground.