Definition
When two power-driven vessels are crossing so as to involve risk of collision, the vessel which has the other on her own starboard side keeps out of the way and must, if the circumstances of the case admit, avoid crossing ahead of the other vessel. At night the give-way vessel typically sees the red sidelight of the stand-on vessel, giving rise to the mnemonic that seeing red means stop. The customary avoiding action is a bold alteration to starboard.
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