Question 403Navigation General

The correct answer is D) A fixed red light. A fixed red light indicates that the drawbridge will not be opened immediately. This signal communicates to the vessel that the drawbridge operator has received the request to open the draw, but is unable to do so at that time. The other options, such as a flashing amber light, flashing white light, or vertically raised and lowered white flag, would typically indicate that the drawbridge is preparing to open or is in the process of opening. The fixed red light is the visual signal that conveys the drawbridge is not able to open the draw immediately in response to the vessel's request.