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Abbreviations and Acronyms
AGL -- Above Ground Level
ARFF -- Airport Rescue and Fire Fighting Facility
ATC -- Air Traffic Control
ATCT -- Air Traffic Control Tower
dB -- Decibel
DNL or LDN -- Day-Night Average Sound Level
DOA -- Department of Aviation
FAA -- Federal Aviation Administration
FAF -- Final Approach Fix
FAR -- Federal Aviation Regulation
ft. -- Feet
FPM -- Feet Per Minute
IFR-- Instrument Flight Rules
KIAS -- Knots Indicated Airspeed
MDW -- Chicago Midway Airport
MSL-- Mean Sea Level
NAVAIDS -- Navigational Aids
ORD -- Chicago O'Hare International Airport
Part 150 -- FAR Part 150 Noise Compatibility Planning
Go to Fly Quiet Program
Back to Department of Aviation
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