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What does IM stand for?

IM stands for Inner Marker (aviation; part of instrument landing system)

This definition appears frequently and is found in the following Acronym Finder categories:

  • Military and Government

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Other Resources:
We have 59 other meanings of IM in our Acronym Attic

Samples in periodicals archive:

iFlightPlanner and the IMC Club will work together to enhance iFlightPlanner's integrated, digital logbook with features that will allow pilots who are participating in the club's Inner Marker Circle, a subset of members who have committed to proficiency standards that are higher than FAA instrument currency requirements, to easily manage their flying.
The bird must have damaged the ILS antenna because we had nothing --no glideslope, no azimuth, and no outer, middle or inner markers.
According to the organization's website: “The Inner Marker Circle is an elite group of pilots who are dedicated to the consistent and constant improvement of instrument flying skills.