RAIM vs WAAS Explained Simply: GPS Made Easy
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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