Which navigation lights are required on mechanically powered boats?

Which navigation lights are required on mechanically powered boats?

• A. Masthead light only
• B. Masthead, side, and stern lights
• C. Side lights only
• D. All-around white light

Answer: (B)

When a boat is mechanically powered, it must show a complete set of running lights so others can see its status and direction at night or in reduced visibility. The required setup includes a white masthead light shown forward, red and green side (sidelights) to indicate the vessel’s port and starboard sides, and a white stern light at the rear. This combination covers the front, sides, and rear, helping approaching vessels determine whether you’re underway and where you’re headed, which reduces the risk of collision. The other options don’t meet this requirement: a masthead light alone doesn’t reveal your position to the sides or rear; side lights alone don’t indicate forward movement; and an all-around white light isn’t sufficient for the full running-light needs of an underway power-driven vessel (though it may be used as an anchor light in other situations).

When a boat is mechanically powered, it must show a complete set of running lights so others can see its status and direction at night or in reduced visibility. The required setup includes a white masthead light shown forward, red and green side (sidelights) to indicate the vessel’s port and starboard sides, and a white stern light at the rear. This combination covers the front, sides, and rear, helping approaching vessels determine whether you’re underway and where you’re headed, which reduces the risk of collision. The other options don’t meet this requirement: a masthead light alone doesn’t reveal your position to the sides or rear; side lights alone don’t indicate forward movement; and an all-around white light isn’t sufficient for the full running-light needs of an underway power-driven vessel (though it may be used as an anchor light in other situations).