Cardinal system of marking

From International Dictionary of Marine Aids to Navigation
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Cardinal system of marking (or buoyage)

An agreed system of visual aids to navigation used to indicate the relative position of an obstruction (e.g. shoal, wreck) on the compass scale (cardinal points).

Note: The relative position of the obstruction on the compass scale is indicated by aids to navigation of defined shape, colour or light characteristics.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)