Annex I, section 9(a)(i) – Horizontal sectors
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1427 – Unified Interpretations of COLREG 1972, as Amended – (28 May 2012) - Annex – Unified Interpretations of COLREG 1972, as Amended - Annex I, section 9(a)(i) – Horizontal sectors

Annex I, section 9(a)(i) – Horizontal sectors

 COLREG Annex I, section 9(a)(i) would require the full intensity of the side lights to be maintained in the forward direction of 1° outside the prescribed sector with the practical cut-off between 1° and 3°. This is needed to enable other vessels to determine a "head-on-situation" as per COLREG rule 14.

Parent topic: Annex – Unified Interpretations of COLREG 1972, as Amended
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