horizon

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Related to radar horizon: Over the horizon radar

horizon

noun border, boundary, field of view, field of vision, prospect, range, range of vision, realm, skyline, view, vista
References in periodicals archive ?
The weather stretched across the entire radar horizon, approximately 60 miles.
For example, a collector must be at 25,000 feet to be able to detect a signal source at 195 nm, even with no obstructing terrain, due to the effect that simple Earth curvature has on the radar horizon.
But the E-2C or AWACS may see a track that is not within a ship's radar horizon, for example.