Why do airports add surface radar instead of relying only on tower eyes?
Show answer & explanation
Answer: Eyes miss fast, split tasks
Eyes miss fast, split tasks ✓ — Correct! Tower controllers may be scanning multiple runways, hearing several radio calls, and handling an abnormal situation at the same time. At night, in bad weather, or with awkward sightlines, eyesight alone is not a stable safety net. Surface radar and similar tools keep a persistent map of who is moving where and can flag conflicts humans might notice too late.
Radar lights the runway — Wrong. Surface radar is not there to light the runway. Its job is to track movement on runways and taxiways so controllers can see developing conflicts even when lighting, distance, or workload make pure visual monitoring weaker.
It assigns parking gates — Wrong. Gate assignment belongs to airport operations, not runway-safety radar. These systems exist because a busy airport needs more than a person looking out a window; it needs a continuous, system-level picture of the ground movement area.
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