Radial Screens

From International Dictionary of Marine Aids to Navigation
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2-4-140

Opaque screens placed along lines radiating from the source or from a panel in an optical apparatus, especially to reduce stray light.

Ch2 Fig39.jpg




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