Drum Lens

From International Dictionary of Marine Aids to Navigation
Revision as of 09:55, 1 March 2009 by Oferiks (talk | contribs)
Jump to navigation Jump to search


(Dioptric) Drum Lens

A fixed lens consisting of dioptric elements only. (Fig. 16b)

Ch2 Fig16b.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