You are the stand-on vessel but should take precautions in case the other operator doesn't see you.
When boating at night, a single white light on a vessel tells you that it is anchored.
When boating at night a red and white light on a vessel tells you that you must give way to the other vessel.
You are looking at the Starboard (right) side of the boat. If you can't see the white stern light then that boat is pointed toward you.
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
From dead ahead to 22.5 degrees abaft the starboard beam
You are boating at night you see a single white light directly ahead, you should give way by going around the other vessel.
Starboard (right side).
another vessel is at anchor
The head and starboard side of the vessel is toward you
The head and starboard side is toward you
you are following another vessel on it's starboard side. the stern light and stbd running light are visible
If you are boating at night, and you see a single white light on another boat this light tells you that you are overtaking another vessel or it is anchored. It is mandatory for all engine powered boats and shines forward. If there is no light it indicates a sailboat under sail.