Remove AGL Remove Altimeter Remove Instrument Landing System
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RNAV Approaches Simplified: A Guide for New Pilots

Pilot Institute

Theyre especially useful for airports that dont have the budget or suitable terrain to install an Instrument Landing System (ILS). This makes more airports accessible under Instrument Flight Rules (IFR). Theyre pretty much the same thing, but heres the difference: DH is measured above the ground (AGL).