PPRuNe Forums - View Single Post - Cardiff City Footballer Feared Missing after aircraft disappeared near Channel Island
Old 29th Jan 2019, 15:12
  #826 (permalink)  
DaveReidUK
 
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Radar is, essentially, line-of-sight. An aircraft doesn't have necessarily to be at sea level before it's invisible to radar.

https://en.wikipedia.org/wiki/Radar_horizon
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