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Aviation Dictionary

Outer marker

A marker beacon at or near the glideslope intercept altitude of an ILS approach. It is normally located four to seven miles from the runway threshold on the extended centerline of the runway.

Dictionary Term

Outer marker

Definition

  • A marker beacon at or near the glideslope intercept altitude of an ILS approach. It is normally located four to seven miles from the runway threshold on the extended centerline of the runway.

References

  • Pilot's Handbook of Aeronautical Knowledge · Federal Aviation Administration · 2023