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How to Fly an ILS Approach

Pilot Institute

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. This is provided by Marker Beacons, DME, and GPS.

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How to Read an IFR Approach Chart

Pilot Institute

However, if you look at the requirements section, youll find that you also need Distance Measuring Equipment (DME) if youre entering from a particular waypoint. Since this example chart shows an ILS or LOC approach, you already know your aircraft requires a functioning ILS receiver.

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Navigating Instrument Failure at 10,000 Feet

Fear of Landing

One hour out, our ground speed is an absurdly slow: seventy knots as indicated by our distance measuring equipment (DME). I tighten my five-point harness that secures our shoulders and hips, with a belt between our legs to prevent us from slipping forward. Out of the corner of my eye, I see Gavin tighten his harness.

Weather 98
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ILS Explained (With Examples)

Pilot Institute

Marker Beacons These days, the ILS is generally paired with a DME (Distance Measuring Equipment). It allows the pilots to compare their height at each DME distance to the promulgated chart. Usually, this is small, light aircraft used in general aviation(single-engine airplanes).