When operating a powerboat at night and you see a green and white light on another boat what do these lights tell you?

When operating a powerboat at night, seeing a green light on another boat indicates that the vessel is facing you from the starboard (right) side, while the white light suggests it is likely a powerboat. According to navigation rules, the green light is a sidelights indicating which way the other boat is oriented. You should maintain a safe distance and be prepared to take evasive action if necessary.