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Preparation for landing | e.g. flight: Boeing 737-800 - Flight Simulator X Game Guide | gamepressure.com
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Esterline completes testing of GPS landing sensor unit for Boeing 737 | Aerospace Testing International
The 737 Handbook - Just past the IAF on an RNP AR approach you receive GPS-L INVALID followed by GPS-R INVALID (no GPS light is illuminated). Your ANP is 0.03 your RNP
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