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CFI lesson plans to teach aviation lessons as a Certified Flight Instructor

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UNRELIABLE (GPS/WAAS)

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GPS/WAAS

An advisory to pilots indicating the expected level of service of the GPS and/or WAAS may not be available. Pilots must then determine the adequacy of the signal for desired use.

Source FAA Pilot/Controller Glossary↗ · checked 2026-08-25

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