Difference between revisions of "Ring around"
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Revision as of 13:00, 15 February 2009
4-3-485
Ring around (in secondary radar)
1. The undesired triggering of a transponder by its own transmitter.
2. The triggering of a transponder at all bearings causing a ring presentation on a P.P.I.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)