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 route or procedure being flown (e.g., en route, terminal, or approach), and is conducted under ATC clearance.
Plain English
Flying from place to place using instruments and approved navigation systems, under air traffic control instructions, instead of looking outside to find your way.
Context Anchor
Seen in instrument flying, GPS use, flight plans, clearances, and instrument approach discussions.
Derivation
IFR stands for Instrument Flight Rules — the set of regulations governing flight by reference to instruments. 'Navigation' comes from the Latin navigare, meaning 'to sail or steer a ship.' Together, the phrase simply means steering the aircraft by instruments rather than by sight.
Why Pilots Care
Enables safe flight through clouds and low visibility where visual navigation cannot be used.
Intuition Check
Do not read IFR navigation as simply “using GPS to get there.” It means navigating under instrument flight rules using equipment and procedures that are approved for that kind of flight.
Example Sentence 1
Before departure, the pilot confirmed that the GPS unit was approved for IFR navigation along the planned route.
Example Sentence 2
Good IFR navigation kept the aircraft on the airway even with no visibility outside the cockpit.