eli5: how is it possible to fly below radar (per movies)?
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If the flight planners knows where the search radars are situated they can map out a path that keeps the plane “masked” by terrain features.
Tactical aircraft are usually equipped with RWR gear (that’s Radar Warning Receiver). The RWR will alert the pilot when their aircraft is being “painted” by a radar. The newer RWR gear will identify the type of radar, and display a bearing to it. RWR systems pick up airborne radar threats as well as land-based and the pilot can alter course to avoid detection.
Stealthy planes can improve their survivability by keeping their “low observable” side pointed toward the threat radar in hopes of it being undetectable.
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