Constrained by draught; less than 50 metres; port side.

Fishing vessel other than a trawler; starboard side.

The sailing vessel which has the wind on the port side shall keep out of the way of the other.

Constrained by draught; 50 metres or more; ahead.

Power-driven vessel; less than 50 metres; port side.

Vessel engaged in dredging or underwater operations; 50 metres or more; restricted in her ability to manoeuvre; starboard side; underway; starboard side on which the obstruction exists.

Restricted in her ability to manoeuvre; less than 50 metres; ahead.

Tug hampered by tow; 50 metres or more; astern > 200 m in length; port side. 

Not under command; making way; ahead.

Tug hampered by tow; 50 metres or more; astern > 200 m in length; starboard side.

Vessel engaged in dredging or underwater operations; 50 metres or more; restricted in her ability to manoeuvre; port side; port side on which may pass.

Two vessels: left - sailing vessel; shall keep out of the way; right - vessel not under command.

Fishing vessel other than a trawler when there is outlying gear extending more than 150 metres horizontally from the vessel.

Trawler; stopped and making no way through the water.

Vessel engaged on PILOTAGE duty; no specified length; port side.

A vessel is in distress and requires assistance.

For identification from the air.

Constrained by draught; more that 50 metres; starboard.

Both sailing vessels have the wind on the same side; the vessel which is to windward shall keep out of the way of the vessel which is to leeward.

Vessel engaged in mine clearance; 50 metres or more; ahead; dangerous to approach within 1000 metres of the mine clearance vessel.