22.17 Action by stand-on vessel

(1) If one of two vessels is to keep out of the way, the other must keep its course and speed.

(2) As soon as it becomes apparent to the stand-on vessel that the vessel required to give way is not taking appropriate action in compliance with this Part—

(a) it may take action to avoid collision by its manoeuvre alone; and

(b) if it is a power-driven vessel in a crossing situation, if the circumstances of the case allow, it must not alter course to port for a vessel on its own port side.

(3) When, from any cause, the stand-on vessel finds itself so close that collision cannot be avoided by the action of the give-way vessel alone, it must take whatever action will best avoid collision.

(4) This rule does not relieve the give-way vessel of its obligation to keep out of the way.