Shadow region

From International Dictionary of Marine Aids to Navigation
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Alternative term: Blind sector

The region from which, under normal propagation conditions, the received field strength is so reduced by some obstruction that effective radar detection of objects in this region is improbable.

Reference: B.S.

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

Centre of buoyancy


International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM