Fog-bank detector

From International Dictionary of Marine Aids to Navigation
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5-4-355

A device which detects the presence of a region of severely reduced visibility at a distance from the device and can be used to control aids to navigation when the nearer boundary of the region is within a prescribed distance from the detector and within a sector wherein navigation may be affected.




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