IFR AIRCRAFT/IFR FLIGHT
An aircraft conducting flight in accordance with instrument flight rules.
IFR CONDITIONS
weather conditions below the minimum for flight under visual flight rules ...
IFR aircraft fly in a cylinder 10 nm (ARTCC) to 6 nm (terminal) diameter. The cylinder extends 1000' above and below the aircraft, ATC normally allows much more space.
a. An IFR aircraft requests a climb/descent in VFR conditions.
b. The clearance will result in noise abatement benefits where part of the IFR departure route does not conform to an FAA approved noise abatement route or altitude.
Air Traffic Control will apply separation distances to IFR aircraft except to VFR following a medium or heavy aircraft or IFR on a visual approach and were the pilot reported the previous traffic in sight and follows and maintains own separation.
The primary function of Approach/Departure control is to separate the IFR aircrafts flying into and out of the airport.
It is usually ATC's responsibility to position IFR aircraft (rather than VFR aircraft, which navigate their own way visually) so that they can 'establish' on the ILS - to get lined up with the ILS 'localiser' which marks the runway centreline.
VFR-on-top. ATC authorization for an IFR aircraft to operate in VFR conditions at any appropriate VFR altitude.
VFR over-the-top. A VFR operation in which an aircraft operates in VFR conditions on top of an undercast.
The term may be used as an ATC clearance/instruction only when: an IFR aircraft requests a climb/descent in VFR conditions, ...
IFR (Instrument Flight Rules) Regulations governing flight when an IFR flight plan has been filed and activated. Air Traffic Control provides separation between IFR aircraft.
Centers control IFR aircraft from the time they depart from an airport or terminal area's airspace to the time they arrive at another airport or terminal area's airspace.
Rules governing flight in certain limited visibility and cloud conditions. Under IFR, an aircraft is required to be in contact with air traffic control facilities and is separated by ATC from all other IFR aircraft.
Instrument Landing System (ILS) ...
Instrument Flight Rules (IFR)
Rules governing flight in certain limited visibility and cloud conditions. Under IFR, an aircraft is required to be in contact with air traffic control facilities and is separated by ATC from all other IFR aircraft.
VFR aircraft are only separated from IFR aircraft within the airspace.
Terminal Radar Service Area (TRSA): A specified area around a terminal in which participating VFR pilots are provided separation from other participating VFR aircraft and IFR aircraft.
must establish two-way radio communications with the ATC facility providing air traffic services prior to entering the airspace and thereafter maintain those communications while within the airspace. VFR aircraft are only separated from IFR aircraft ...
 See also: Pilot, IFR, Navigation, Aircraft, Flight
  
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