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.

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

Tug & tow; astern; towing two vessel.

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

Sailing vessel; underway; port side.

Tug & tow; less than 50 metres; pushing ahead.

Not under command; making way; starboard side.

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

Tug & tow; astern; towing one vessel.

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

Vessel engaged in dredging or underwater operations; restricted in her ability to manoeuvre; astern; underway; may pass on starboard side. 

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

Tug hampered by tow; astern.

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

Power-driven vessel; less than 50 metres; ahead.

Restricted in her ability to manoeuvre; 50 metres or more; port side.

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

Power-driven vessel; 50 metres or more; starboard side.

Tug & tow; less than 50 metres; astern < 200 m in length; starboard side.

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