A powerboat is operating at night. Which of the following lights must be displayed according to standard navigation rules?

• A. Red and green sidelights and a white stern light
• B. Only a single white light at the bow
• C. Only a flashing yellow light
• D. Only red and green sidelights

Answer: (A)

Verified step by step guidance

1. Understand that navigation rules for vessels at night require specific lights to indicate the boat's position and direction to other vessels.
2. Recall that a powerboat underway must display red and green sidelights to show the port (left) and starboard (right) sides respectively, helping others determine its direction.
3. Recognize that a white stern light must also be displayed at the rear of the boat to indicate the vessel's length and orientation.
4. Note that a single white light at the bow or only a flashing yellow light do not provide sufficient information about the boat's direction and position according to standard navigation rules.
5. Conclude that the correct combination of lights for a powerboat operating at night is red and green sidelights along with a white stern light.