Rules of the Road · Narrow Channels & TSS
Under Rule 9, a vessel proceeding along a narrow channel or fairway shall:
- AKeep to the center of the channel at all times
- BKeep as near to the outer limit of the channel on her starboard side as is safe and practicable✓ Correct
- CGive way to all vessels overtaking from astern
- DSound one short blast to signal her intention to maintain course
Explanation
Rule 9(a) requires vessels in a narrow channel to keep to the starboard side of the channel — not the center. This mirrors the road rule and ensures predictable traffic flow, reducing the risk of head-on encounters in confined waterways.
Authority: 72 COLREGS Rule 9(a)
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