| AGL |
Above ground level |
| AIP |
Aeronautical Information Publication |
| Airways |
Corridors of sky usually linking VORs or
NDBs. Aircraft using them are protected by
internationally agreed rules of separation. They are normally
named by reference to a colour and number, e.g. Amber 25 is an
airway across the west of the country from Liverpool to Exeter |
| AMSL |
Above mean sea level |
| AOC |
Air Operator Certificate |
| ATC |
Air Traffic Control |
| ATIS |
Automatic Terminal Information Service - continuous airport
weather information for pilots |
| AVGAS |
Aviation Gasoline - used by piston engined aircraft |
| AVTUR |
Aviation Turbine Fuel - used by jet and and turbo-prop aircraft |
| CAA |
Civil Aviation Authority |
| CAP |
Civil Aviation Publication - the formal publications of the
CAA all have a CAP number. The CAA's publications can be
seen on their website |
| CTR |
Control Zone |
| DME |
Distance Measuring Equipment - gives pilots a readout
of the distance between the DME facility and the aircraft |
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| ETOPS |
Extended Twin Jet Operations. ETOPS rules limit how far
twin-engine jets can stray from airfields as they fly over the
poles or across oceans. They also require strict maintenance
regimes, extra reserve fuel and additional cargo-fire-suppression
equipment. |
| FIR |
Flight Information Region - a defined airspace within which
flight information and alerting services are provided. Great Britain
is divided into the London and Scottish FIRs centred on Swanwick
and Prestwick respectively. |
| FL |
Flight Level - an altitude measured above sea level based on
a standard pressure setting of 1013.25mb, eg FL 250 = 25,000
feet with the aircraft's altimeter at the standard pressure setting. |
| GPS |
Global Positioning System - a satellite based naviation system |
| GLONASS |
Global Orbiting Navigation Satellite System - Russian satellite
navigation system similar to GPS |
| IMC |
Instrument Meteorological Condition |
| IFR |
Instrument Flight Rules |
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