Question 649 Rules of the Road

The correct answer is D) during daylight hours. According to the U.S. Coast Guard regulations, the shapes for a vessel restricted in her ability to maneuver must be displayed during daylight hours. This is because the shapes are a visual signal to other vessels to indicate the vessel's limited maneuverability, which is important for safe navigation. The requirement applies both in international and inland waters, and is not limited to specific time periods like sunset to sunrise or 8 AM to 4 PM. The other options are incorrect because they either restrict the display of the shapes to specific time periods (A and B) or allow for exceptions in restricted visibility (C), which is not the case according to the regulations.