Colour Filter

From International Dictionary of Marine Aids to Navigation
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2-2-200

Alternative term: (Colour) Shade (G.B.)

A selective filter, usually of glass or plastic, producing a change of colour in the transmitted light.

Ch2 Fig45.jpg




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

[[Category:2.2 Optical Apparatus]