Axis (of a fixed lens)

From International Dictionary of Marine Aids to Navigation
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2-2-115

The vertical line comprising the axes of revolution of the belt and rings composing the fixed lens. (Fig. 16b)

File:Ch2 Fig16.jpg




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

[[Category:2.2 Optical Apparatus]