you are on the port side of the vessel
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.
When boating at night a red and white light on a vessel tells you that you must give way to the other vessel.
All vessels at sea use a red light on the port side (left facing forward to front of vessel), and a green light on the starboard side (right).
Red
fishing at night
During nighttime transit another boat's lights show: Green - the right, or starboard side, of that vessel; Red - the left, or port side, of that vessel; White - the rear of that vessel. The vessel is heading directly toward you
red
The head and port side of the vessel is toward youAnswer The red light is the port side light which is on the left side of the boat. So if you can only see the red light, the boat has its left side toward you with its bow to the left of the red light and the stern to the right of the red light.If you can only see the red light, then that boat has the right of way and you have to manoeuvre to avoid it. The default manoeuvre is to steer starboard (right)which will take you behind the other boats direction of travel.(The starboard (right) side light is green.)
another vessel is at anchor
The red light is called the Port side and is on the left as you are piloting the vessel. The right side is called the Starboard and the colored light is green.
Without seeing the actual configuration there isn't enough information to make a decision. Am I seeing the port side aspect of of the vessel? A port side running light at 112.5 degrees and a masthead light at 225 degrees? Where are the lights in relation to each other?