Luminous beam

From International Dictionary of Marine Aids to Navigation
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2-1-085

(Luminous) Beam

Alternative term: (Light) Beam

A group of rays emanating from a light source, and in general from an optical device.




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

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM