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
You are approaching the starboard side of another vessel
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.
A visible white light indicates that the other vessel is a power-driven vessel.
You are approaching the stern of another vessel
In darkness or reduced visibility, visible red and green lights on a vessel indicate its orientation and direction of travel. A steady red light on the port (left) side and a steady green light on the starboard (right) side signify that the vessel is underway and facing the observer. If you see both red and green lights, it means you are approaching the bow of the vessel. If only one light is visible, it indicates the vessel's side, helping you assess its direction and take appropriate navigational actions.
In maritime navigation, visible white lights indicate a vessel's masthead light or stern light, while green lights signify the starboard side of a vessel. When encountering another vessel in darkness, if you see a green light, it means the vessel is approaching from your right side. Conversely, a visible white light could suggest that you are either approaching the stern of the vessel or that it is facing you. Understanding these light signals helps in determining the direction and movement of nearby vessels to avoid collisions.
You are approaching the port side of another vessel
3 seconds of rapid bell ringing