Instrument Flight Rules Instrument Landing System Runway 
Pilot Institute
FEBRUARY 15, 2025
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). Otherwise, the airport would have to suspend flight operations in poor visibility.
Pilot Institute
DECEMBER 19, 2024
While WAAS-enabled equipment has a built-in integrity monitoring system that eliminates the need for RAIM, you may still require RAIM functionality for non-WAAS operations or as a redundancy check in areas where WAAS coverage is unavailable. During IFR (Instrument Flight Rules) flights.
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