Primary radar

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4-3-005

The detection of objects and the determination of their distance and speed by measuring the transit time, phase or frequency of the re-radiated electromagnetic waves. In most cases also the horizontal angle of radiation is measured.

Reference: N.T.G. (modified)




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

North

No

Newton

Julian date

Time period

roll period

Transmissivity

centre of gravity

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