When are navigation lights required and what do they indicate?

When are navigation lights required and what do they indicate?

• A. From noon to sunset.
• B. From sunset to sunrise or when visibility is reduced; display the proper lights for powered, sailing, and towing configurations.
• C. Only during storms.
• D. Lights are optional.

Answer: (D)

Navigation lights communicate where you are on the water, how you’re moving, and what kind of vessel you are, especially when it’s dark or visibility is poor. Because other mariners rely on those lights to judge distance, heading, and potential collision risk, you must display the proper lighting from sunset to sunrise and anytime visibility is reduced. The specific arrangement depends on your mode of operation: powered vessels show the standard red and green sidelights along with a white stern light to mark your direction and that you’re moving under power; sailing vessels use the appropriate sidelights and a white stern light when underway to indicate sailing under sail; towing operations add a yellow towing light to warn others you’re behind a tow. In short, lights aren’t optional—they’re essential signaling that helps others understand your presence, course, and mode of operation.

Navigation lights communicate where you are on the water, how you’re moving, and what kind of vessel you are, especially when it’s dark or visibility is poor. Because other mariners rely on those lights to judge distance, heading, and potential collision risk, you must display the proper lighting from sunset to sunrise and anytime visibility is reduced. The specific arrangement depends on your mode of operation: powered vessels show the standard red and green sidelights along with a white stern light to mark your direction and that you’re moving under power; sailing vessels use the appropriate sidelights and a white stern light when underway to indicate sailing under sail; towing operations add a yellow towing light to warn others you’re behind a tow. In short, lights aren’t optional—they’re essential signaling that helps others understand your presence, course, and mode of operation.