A vessel not under command; a vessel restricted in her ability to manoeuvre; a vessel constrained by her draught; a sailing vessel; a vessel engaged in fishing and a vessel engaged in towing or pushing another vessel in restricted visibility.

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.

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