Vessel engaged in mine clearance; less than 50 metres; ahead; dangerous to approach within 1000 metres.

Tug hampered by tow; 50 metres or more; astern < 200 m in length; ahead.

Fishing vessel other than a trawler; starboard side.

Tug & tow; 50 metres or more; astern < 200 m in length; ahead.

Constrained by draught; 50 metres or more; ahead.

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

Two vessels: left - restricted in her ability to manoeuvre; right - sailing vessel; shall keep out of the way.

Tug & tow; 50 metres or more; astern < 200 m in length; starboard side.

Vessel engaged in dredging or underwater operations; less than 50 metres; restricted in her ability to manoeuvre; stopped and making no way; green lights side may pass.

For identification from the air.

Tug hampered by tow; less than 50 metres; astern < 200 m in length; port side.

 Trawler; 50 metres or more; making way; port side.

Sailing vessel or vessel under oars underway bow view. Vessel being towed bow view.

Fishing vessel other than a trawler; stopped and making no way through the water.

Sailing vessel; underway; starboard side.

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

Two vessels: left - any type of fishing vessel; shall keep out of the way; right - tug & tow; restricted in her ability to manoeuvre.

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

Not under command; making way; astern or aground less than 50 metres.

Trawler; 50 metres or more; hauling her nets; port side.