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Instrument flight rules - Wikipedia, the free encyclopedia (838 words) |
 | Instrument flight rules (IFR) is a set of regulations and procedures for flying aircraft without the assumption that pilots will be able to see and avoid obstacles, terrain, and other air traffic; it is an alternative to visual flight rules (VFR), where the pilot is primarily or exclusively responsible for see-and-avoid. |
| One advantage of IFR is the ability to fly an aircraft in instrument meteorological conditions (IMC), weather conditions that do not meet the minimum visibility requirements for VFR. |
| It is important, however, not to confuse IFR with IMC: the vast majority of IFR flying is done under visual meteorological conditions (VMC), and in many cases, the pilot will be controlling the aircraft primarily by outside visual references, as with VFR. |
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