The instrument landing system is the most commonly used approach guide system in civil aviation airports.It is an important navigation equipment to help aircraft safely and smoothly through the most dangerous landing before 8 minutes.The falling beacon has high requirements on the reserve,and the damage of the reserve will lead to the unavailable navigation signal,or even the aircraft can fly controllable and hit the ground.This paper makes some simple thoughts on the control of the declining beacon reserve for readers to discuss.
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