BOTH INTERNATIONAL & INLAND When is a stand-on vessel FIRST allowed by the Rules to take action in order to avoid collision?

Correct Answer: Option D — When the give-way vessel is not taking appropriate action to avoid collision.

Rule 17(a)(ii) allows the stand-on vessel to take action to avoid collision by her maneuver alone as soon as it becomes apparent to her that the vessel required to keep out of the way is not taking appropriate action in compliance with the Rules of the Road.