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How transponders, surface‑surveillance and layered systems reduce runway collision risk — lessons from LaGuardia

The LaGuardia crash has refocused scrutiny on transponders, surface‑surveillance systems and procedural 'layered' defenses that prevent runway collisions. This explainer outlines how aircraft transponders, airport surface‑detection technology, ATC procedures and collision‑avoidance alerts interact — and where gaps revealed by the LGA incident may remain.

2026-03-26T08:19:37.471172-07:00

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