Lamp Changer

From International Dictionary of Marine Aids to Navigation
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Alternative term: Lamp Exchanger (G.B.)

A mechanism, usually operated automatically, which replaces one lamp by another in service in a light.

Most usually this is done when the first lamp has failed in service.

Ch2 Fig10.jpg

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

centre of gravity

Centre of buoyancy

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