Rule 15
As power-driven vessels drive on the right, and turn to the right, they also give way to the right when they meet in a crossing situation.
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At night, if you see a red light you must give way, a green light means you are the stand on vessel.
There is a saying which some people find useful:If to starboard, should red appear, it's your duty to keep clear!
This rule only applies to power-driven vessels, not sailing vessels (see Rule 12.)
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