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| | Instrument flight rules - Unipedia (Site not responding. Last check: 2007-10-26) |
 | | 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. |
 | | It is important, however, not to confuse IFR with IMC: the vast majority of IFR flying is done under visual meteorological conditions, and in many cases, the pilot will be controlling the aircraft primarily by outside visual references, as with VFR. |
 | | Enroute flight is described by IFR charts showing navigation aids, fixes, and standard routes called airways with minimum safe altitudes for each segment. |
| www.unipedia.info /IFR.html (903 words) |
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