Swing - angle
From International Dictionary of Marine Aids to Navigation
4-2-255
Alternative term: Null width
The angle containing the direction of a bearing observation and bounded by limits within which the variation of the intensity of the signal is too slight to be detected.
Note: The magnitude of the swing may alternatively be expressed as plus and minus half the angle defined above.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
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