Rules of the Road

Crossing

Technical visualCrossing power-driven vessels
Crossing power-driven vesselsA power-driven vessel with the other vessel on its starboard side takes early, substantial action to keep clear.OWN VESSELTARGET
Crossing power-driven vesselsA power-driven vessel with the other vessel on its starboard side takes early, substantial action to keep clear.OWN VESSELTARGET
Rule 15: the vessel that has the other on its starboard side keeps out of the way and, where circumstances admit, avoids crossing ahead.

Rule 15

When two power-driven vessels are crossing with risk of collision:

the vessel that has the other on its starboard side must keep out of the way

where circumstances admit, the give-way vessel should avoid crossing ahead

Inland nuance

Special provisions apply on certain rivers where vessels are crossing a river.

Do not teach "boat on the right always wins." Rules 9, 10, 13 and special circumstances can change the analysis.

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