Question 146 Rules of the Road

The correct answer is D) visible at night and during periods of restricted visibility. The lights shown in illustration D081RR are Restricted Flashing Yellow Lights, which are used to mark obstructions or hazards to navigation. According to the U.S. Coast Guard Inland Navigation Rules, these lights must be visible at night and during periods of restricted visibility, which makes option D the correct choice. The other options are incorrect because they do not fully capture the requirements for Restricted Flashing Yellow Lights. Option A is incorrect as the visibility requirement is not limited to 1 mile. Option B is incorrect as the flashing rate is not specified. Option C is incorrect as the distance between the lights is also not a requirement for this type of navigational aid.