How far from the runway threshold is the Middle Marker (MM)?

How far from the runway threshold is the Middle Marker (MM)?

• A. 2,000 to 6,000 ft
• B. 1,000 to 2,000 ft
• C. 6,000 to 8,000 ft
• D. 8,000 to 10,000 ft

Answer: (A)

The middle marker provides a fixed reference point on the ILS approach and is located about 3,500 feet from the runway threshold, placing it in the 2,000 to 6,000 feet range. It sits between the outer marker (farther from the threshold) and the inner marker (nearest the threshold) to give you a clear mid-approach cue as you descend. The marker is indicated with amber lighting and a distinctive audio cue, helping you verify your position along the approach. Distances like 1,000–2,000 feet are too close for the middle marker, while 6,000–8,000 or 8,000–10,000 feet are too far.

The middle marker provides a fixed reference point on the ILS approach and is located about 3,500 feet from the runway threshold, placing it in the 2,000 to 6,000 feet range. It sits between the outer marker (farther from the threshold) and the inner marker (nearest the threshold) to give you a clear mid-approach cue as you descend. The marker is indicated with amber lighting and a distinctive audio cue, helping you verify your position along the approach. Distances like 1,000–2,000 feet are too close for the middle marker, while 6,000–8,000 or 8,000–10,000 feet are too far.