BOTH INTERNATIONAL & INLAND When is a stand-on vessel in a crossing situation allowed to take action?

Correct Answer: Option B — it becomes apparent to her that the give-way vessel is not taking appropriate action

Rule 17(a)(ii) dictates that when the give-way vessel fails to take appropriate action, the stand-on vessel may take action to avoid collision. This is the 'action by stand-on vessel' provision, which permits, and eventually requires, the stand-on vessel to maneuver once the give-way vessel's inaction becomes apparent.