Radio Altimeter(RA)
Definition
An instrument that measures exact height above the ground using radar signals. Accurate below 2500 feet AGL, the radio altimeter is essential for approach minimums, GPWS, and autoland operations.
Why Radio Altimeter Matters for Pilots
Instrument knowledge is tested on every pilot certificate exam. Understanding how Radio Altimeter works helps you interpret cockpit information correctly and recognize instrument failures before they become emergencies. This knowledge is especially critical for instrument-rated pilots flying in reduced visibility.
Exam Tip
This concept is commonly tested in instruments-related questions on FAA and EASA exams. Make sure you can explain Radio Altimeter in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
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