Decca Lane fraction pointer

From International Dictionary of Marine Aids to Navigation
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4-4-205

Lane fraction pointer (in Decca)

The smaller pointer on a Decometer, giving a reading of the lane fraction on the inner scale of the meter.




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