It tells you which side of the boat is facing you allowing you to pass on the right or left of the oncoming vessel.
If you see red and green (with the red on the right and the green on the left), it's a vessel heading directly towards you (although its course may be different). The white (single) light would indicate that it is a powered vessel as opposed to a sailing vessel. [rhm]
If you observe just the red light on a ship, they have the right-of-way and you are to maneuver to stay clear. In this case, both vessels should take precautions. In any case, the default maneuver is to turn starboard (to the right).
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
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 the stand-on vessel but should take precautions in case the other operator doesn't see you.
Navigation lights, green starboard and red port. Masthead and stern lights should be white
Lighting requirements vary depending on whether you're talking about a sailboat or powerboat, International Rules or Inland Rules, the length of the vessel, and whether or not the vessel is at anchor. However, if at night you see a single white light only (no red or green lights), you're most likely looking at a boat at anchor.
Lighting requirements vary depending on whether you're talking about a sailboat or powerboat, International Rules or Inland Rules, the length of the vessel, and whether or not the vessel is at anchor. However, if at night you see a single white light only (no red or green lights), you're most likely looking at a boat at anchor.
white over red are the lights for a pilot vessel.
From dead ahead to 22.5 degrees abaft the starboard beam
You are the stand-on vessel but be prepared to give way if necessary. When you see a white and a green light, you are the stand-on vessel. You should remain alert, however, in case the other vessel operator does not see you or does not know navigational rules.
You are the stand-on vessel but be prepared to give way if necessary. When you see a white and a green light, you are the stand-on vessel. You should remain alert, however, in case the other vessel operator does not see you or does not know navigational rules.
Head lights, port, starboard and stern lights (on 28' pontoon boat).