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IFR MILITARY TRAINING ROUTES (IR)
Routes used by the Department of Defense and associated Reserve and Air Guard units for the purpose of conducting low-altitude navigation and tactical training in both IFR and VFR weather conditions below 10,000 feet MSL at airspeeds in excess of 250 knots IAS.
Listed in the Pilot/Controller Glossary as a cross-reference to IFR MILITARY TRAINING ROUTES (IR), whose text is shown above.
Source FAA Pilot/Controller Glossary · checked 2026-08-25