At night, which signal does the stand-on vessel observe from the give-way vessel?

At night, which signal does the stand-on vessel observe from the give-way vessel?

• A. Masthead White Light Only
• B. Red Port Light Only
• C. Masthead White Light and Both Red and Green Behind You
• D. Stern White Light

Answer: (C)

When any vessel is moving at night, it shows navigation lights that reveal its activity and direction. A power-driven vessel that is underway displays a white masthead light forward, along with red sidelight on the port side and green sidelight on the starboard side, plus a white stern light. From the stand-on vessel’s perspective, seeing the white masthead light together with both the red and the green sidelights indicates the other vessel is under way and visible to you from the front or side. If you only saw a single light (for example, just a stern light or just one sidelight), that wouldn’t match the standard underway configuration. So the signal you observe from the give-way vessel at night is the Masthead White Light and Both Red and Green.

When any vessel is moving at night, it shows navigation lights that reveal its activity and direction. A power-driven vessel that is underway displays a white masthead light forward, along with red sidelight on the port side and green sidelight on the starboard side, plus a white stern light. From the stand-on vessel’s perspective, seeing the white masthead light together with both the red and the green sidelights indicates the other vessel is under way and visible to you from the front or side. If you only saw a single light (for example, just a stern light or just one sidelight), that wouldn’t match the standard underway configuration. So the signal you observe from the give-way vessel at night is the Masthead White Light and Both Red and Green.