A power-driven boat 50 meters or more in length must display red and ______ sidelights, a masthead light, a stern light, and a ______ light.

A power-driven boat 50 meters or more in length must display red and ______ sidelights, a masthead light, a stern light, and a ______ light.

• A. Red and Green sidelights, a Masthead light, a Stern light, and a Second Masthead light
• B. Red and Green sidelights, a Masthead light, a Stern light, and a Bow light
• C. Red and Green sidelights, a Masthead light, and a Port light
• D. Red and Green sidelights, a Stern light, and a Masthead light

Answer: (A)

The lights described are about signaling a ship’s size and status at night. For power-driven vessels underway, you normally show red and green sidelights, a white masthead light, and a white stern light. If the vessel is 50 meters or more in length, you must add a second white masthead light to the display, arranged in a vertical line with the first masthead light. This extra masthead light helps other vessels judge your length and orientation from a distance and from different angles. That’s why the correct option includes two masthead lights in a vertical line, in addition to the sidelights and stern light. The other possibilities don’t meet the rule: they either omit the second masthead light, or add a bow light, or replace a required light (like the stern light) with something not mandated for this scenario.

The lights described are about signaling a ship’s size and status at night. For power-driven vessels underway, you normally show red and green sidelights, a white masthead light, and a white stern light. If the vessel is 50 meters or more in length, you must add a second white masthead light to the display, arranged in a vertical line with the first masthead light. This extra masthead light helps other vessels judge your length and orientation from a distance and from different angles.

That’s why the correct option includes two masthead lights in a vertical line, in addition to the sidelights and stern light. The other possibilities don’t meet the rule: they either omit the second masthead light, or add a bow light, or replace a required light (like the stern light) with something not mandated for this scenario.