Chart 1 : Symbols, Abbreviations and Terms

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Buoys, Beacons - Section Q

SNS b

Colours of Buoys and Beacon Topmarks

Ref. IHO Symbology Description CHS Symbology
2 Green and black (symbols filled black)
3 Single colours other than green and black
4 Multiple colours in horizontal bands, the colour sequence is from top to bottom
5 Multiple colours in vertical or diagonal stripes, the darker colour is given first
6 Retroflecting material
Note: Retroreflecting material may be fitted to some unlit marks. Charts do not usually show it. Under IALA recommendations, black bands will appear blue under a spotlight.
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