Plain English Meaning

Flying from place to place using instruments and approved navigation systems, under air traffic control instructions, instead of looking outside to find your way.

Full Definition

Navigation conducted under Instrument Flight Rules, in which the pilot determines and maintains the aircraft's position, course, and altitude using approved navigation equipment and procedures rather than visual reference to the ground. IFR navigation requires equipment that meets specific accuracy, integrity, and operational standards for the or being flown (e.g., , , or ), and is conducted under .