Classic Navigation Light Black -Port

Feature:
Boats Navigating at Night – Port, Starboard & Stern Lights
These are shown when a vessel is under way (i.e. not at anchor) and help you to identify which direction a vessel is travelling.
If you can see both the red and green at the same time, then it means they are heading straight for you!
If you can only see a white light then it could either be a vessel at anchor, a slow vessel travelling at less than 7kts or a vessel travelling away from you – its stern light.