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Inst. flight rules
Answer for the clue "Inst. flight rules ", 3 letters:
ifr
Word definitions for ifr in dictionaries
Wikipedia
Word definitions in Wikipedia
IFR is instrument flight rules, rules for when flight by outside visual reference is not safe. IFR may also refer to: Ideal Final Result , an engineering design goal In-flight refueling Institute of Food Research , an agricultural and food science research ...