You are operating a powerboat at night. you see only a green light on another boat. what does this light tell you

If there is only a presence of green light as you approach another boat, then it means that you could have or you're about to approach the star board side of the boat. If you're about to approach, the best way to cope up with this situation or handle them is to give way of your port side. In order to prevent collision or accidents from happening to both parties.