BOTH INTERNATIONAL & INLAND The steering and sailing rules for vessels in restricted visibility apply to vessels __________.

Correct Answer: Option D — navigating in or near an area of restricted visibility

Rule 19 applies to vessels not in sight of one another when navigating in or near an area of restricted visibility. It dictates conduct for vessels detecting others by radar or hearing sound signals, ensuring safe navigation when visual contact is obscured by fog, mist, or heavy rain.