Using GPS as Backup in IMC When Instruments Fail

A 31,000-hour 747 captain, lightplane owner and CFI discusses how an inexpensive handheld GPS receiver can serve as an effective backup in case of failure of gyro instruments, airspeed indicator, or even altimeter. The author contends that as GPS quickly becomes ubiquitous throughout the fleet, pilots should be trained to use it in equipment failure scenarios. He also discusses the use of the magnetic compass and ADF as backup instruments in IMC.

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