How far from the runway threshold is the Inner Marker (IM)?

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Prepare for the ACE Airfield Operations Module 3 Test with a variety of interactive quizzes. Practice with multiple-choice questions that feature helpful hints and detailed explanations to ensure success on your exam!

Multiple Choice

How far from the runway threshold is the Inner Marker (IM)?

Explanation:
On a precision approach, marker beacons provide distance cues along the final approach. The inner marker is the beacon closest to the runway threshold and is used during CAT II/III operations to give a precise cue near touchdown. It is located about 1,000 feet from the threshold, which is why 1,000 feet is the correct distance. Outer markers sit farther out (roughly four to seven miles from the threshold), and middle markers are somewhere in between (often around 3,500 feet from the threshold).

On a precision approach, marker beacons provide distance cues along the final approach. The inner marker is the beacon closest to the runway threshold and is used during CAT II/III operations to give a precise cue near touchdown. It is located about 1,000 feet from the threshold, which is why 1,000 feet is the correct distance. Outer markers sit farther out (roughly four to seven miles from the threshold), and middle markers are somewhere in between (often around 3,500 feet from the threshold).

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