VASI vs. PAPI: Understanding the Differences and Similarities
Pilot Institute
OCTOBER 17, 2024
Using the VASI is crucial as it gives you safe obstruction clearance within 10 degrees of either side of the runway centerline and around four nautical miles from the runway threshold. nautical miles from the runway threshold. VASI systems also are typically cheaper to install and maintain than more advanced systems like PAPI.
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