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Annex I · Positioning and technical details of lights and shapes

COLREGS Annex I · 7 — Colour specification of lights

The chromaticity of all navigation lights shall conform to the following standards, which lie within the boundaries of the area of the diagram specified for each colour by the International Commission on Illumination (CIE). The boundaries of the area for each colour are given by indicating the corner co-ordinates, which are as follows;

(i) White x 0.525 0.525 0.452 0.310 0.310 0.443 y 0.382 0.440 0.440 0.348 0.283 0.382

(ii) Green x 0.028 0.009 0.300 0.203 y 0.385 0.723 0.511 0.356

(iii) Red x 0.680 0.660 0.735 0.721 y 0.320 0.320 0.265 0.259

(iv) Yellow x 0.612 0.618 0.575 0.575 y 0.382 0.382 0.425 0.406

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All COLREGS Rules and Annexes

Part A · General

Part B · Steering and sailing rules

Part C · Lights and shapes

Part D · Sound and light signals

Part E · Exemptions

Part F · Verification of compliance

Annex I · Positioning and technical details of lights and shapes

Annex II · Additional signals for fishing vessels fishing in close proximity

Annex III · Technical details of sound signal appliances

Annex IV

COLREGS oral exam questions and answers — all 114 examiner-style questions on one page, Rule by Rule, as a drill you mark yourself.

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An independent study aid built by CryoSim from the text of the 1972 Collision Regulations as amended. It is not an IMO publication and is not endorsed by the IMO — for navigation and legal purposes, use the official text.