B. ADF RE­QUIRED

Flying - - TRAINING & TECHNIQUE CHART WISE -

More than a few read­ers might be scratch­ing their heads about now try­ing to re­mem­ber how to de­code ADF — au­to­matic di­rec­tion fin­der — as well as fig­ur­ing out if their air­craft is even so equipped. Like many ap­proaches with an ADF-re­quired note, an air­craft with a cur­rent IFR-cer­ti­fied GPS can sub­sti­tute that sys­tem for an op­er­a­ble ADF. In the old days, an ADF re­ceiver that also cov­ered the AM broad­cast band was great for lis­ten­ing to a base­ball game dur­ing a long even­ing flight.

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