Occulting Hood

From International Dictionary of Marine Aids to Navigation
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(Occulting) Hood

An opaque cover brought down over the light source in an optical apparatus to obscure it for a short period.

Most commonly used in occulting lights and in signalling projectors.

Ch2 Fig35.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