You are approaching the starboard side of another vessel
You are approaching the stern of another vessel
You are approaching a sailing vessel - head-on
You are approaching a powerboat head-on
You are approaching a powerboat head-on
You are approaching a powerboat head-on
The other vessel is coming directly toward the observer, so both the port and starboard running lights are visible.
The other vessel is coming directly toward the observer, so both the port and starboard running lights are visible.
You are approaching the stern of another vessel and may be overtaking it
A visible white light on another vessel indicates that it is approaching you head-on. This means you should also exhibit a white light to signify that your vessel is also approaching head-on.
In darkness or reduced visibility, the white light indicates a vessel's stern, while red and green lights indicate the port (left) and starboard (right) sides, respectively. A vessel displaying a red light is facing another vessel, while a green light indicates it is on the starboard side. This color coding helps mariners determine the direction and type of vessel they are encountering, ensuring safe navigation.
You are approaching the stern of another vessel
Go around on either side is the action that is required of Boat A while overtaking Boat B in darkness or reduced visibility.