Distance Measuring Equipment Stability Threshold 
Pilot Institute
JANUARY 14, 2025
DME (Distance Measuring Equipment) calculates the slant range distance to the runway using radio frequencies. Modern IFR-certified GPS can also substitute for DME, providing precise distance information as outlined in AIM 1-2-3. Identify the runway threshold and ensure proper alignment for a safe landing.
Air Facts
MAY 7, 2025
Instrument flights were conducted between these navigation beacons along airways (often called highways in the sky) and a flights progress was measured by crossing intersections (beams from other navigation aids), or in some cases by DME (Distance Measuring Equipment) signals sent out from some VOR stations.
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