Pilot Institute

JUNE 19, 2025

On runways used by international commercial flights, a threshold must be present (we’ll look into that later in this article). Non-precision runways often look similar to visual runways but feature threshold and aiming point markings. A runway threshold identifies the beginning of a runway.

Runway 98

Runway Threshold Instrument Landing System VOR 98

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.

Approach 98

Approach Descent Runway Instrument Landing System 98

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.

Weight-Shift-Control 52

Weight-Shift-Control VOR Runway Distance Measuring Equipment 52

Pilot Institute

SEPTEMBER 24, 2024

The aerials are in a position that provides a threshold crossing height of 50ft. It consists of lights that start at the landing threshold and extend into the approach area. Marker Beacons These days, the ILS is generally paired with a DME (Distance Measuring Equipment). This helps the pilots verify the glideslope.

Knot 52

Knot Approach Distance Measuring Equipment Runway 52