The red light should be on the right side, or port side, of the boat. The green light should be on the left, or starboard, side of the boat.
Starboard ( right side ) and it should be mounted so it is visible at 135 degrees .
You are approaching the stern of another vessel and may be overtaking it
You are approaching the port side of another vessel
You are approaching the starboard side of another vessel
A vessel displaying a visible white light signifies that it is a power-driven vessel. Observing this light helps determine the vessel's status and potential course of action to avoid a collision.
In the visible-light portion of the electromagnetic spectrum, frequencies are lowest near red light (approaching infrared waves) and highest near violet light (approaching ultraviolet rays).
You are approaching a powerboat head-on
Another name for a meteor that is visible from Earth is Meteoroid.
You are approaching a powerboat head-on
You are approaching a sailing vessel - head-on
You are approaching a powerboat head-on
If you are operating a powerboat at night your green side light must be visible to boats approaching over an arc of the horizon 112.5 degrees and so fixed as to show the the light from right ahead to 22.5 degrees abaft of the beam on its respective side.