Transponder Codes Made Easy: A Pilot’s Survival List
Pilot Institute
FEBRUARY 28, 2025
Above 10,000 feet MSL , excluding areas at and below 2,500 feet AGL. If youre in Visual Flight Rules (VFR) conditions, continue your flight visually and land as soon as practical at an appropriate airport. If flying under Instrument Flight Rules (IFR), you must follow standard lost-communication procedures.
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