Plain English Meaning

A way of flying where the pilot controls the aircraft using the cockpit instruments and follows instructions from air traffic control, instead of looking out the window to navigate. It's the system used when clouds, low visibility, or pilot choice make instrument flying necessary.

Full Definition

A set of FAA regulations governing flight conducted primarily by reference to the aircraft's instruments rather than by outside visual reference. IFR flight requires an instrument-rated pilot, an appropriately equipped aircraft, an , and operation within the air traffic control system. rules apply when are below the required for , and pilots may also elect to fly IFR in .