CAP 413
Radiotelephony Manual
Chapter 1 Page 4
Level
A generic term relating to the vertical position of an aircraft in flight and
meaning variously: height, altitude or flight level (ICAO).
Level Bust
Any deviation from assigned altitude, height or flight level in excess of
300 feet.
Microwave Approach
An approach executed by an aircraft, utilising a Microwave
Landing System (MLS) for guidance.
Minimum Descent Altitude/Height
In relation to the operation of an aircraft at an
aerodrome means the altitude/height in a non-precision approach below which
descent may not be made without the required visual reference (ANO).
Missed Approach Point (MAPt)
The point in an instrument approach procedure at
or before which the prescribed missed approach procedure must be initiated in order
to ensure that the minimum obstacle clearance is not infringed.
Missed Approach Procedure
The procedure to be followed if the approach cannot
be continued (ICAO).
Procedural Service
A Procedural Service is an ATS where, in addition to the
provisions of a Basic Service, the controller provides vertical, lateral, longitudinal and
time instructions, which if complied with, shall achieve deconfliction minima against
other aircraft participating in the Procedural Service. Neither traffic information nor
deconfliction advice can be passed with respect to unknown traffic.
Procedure Turn
A manoeuvre in which a turn is made away from a designated track
followed by a turn in the opposite direction to permit the aircraft to intercept and
proceed along the reciprocal of the designated track (ICAO).
Radar Approach
An approach in which the final approach phase is executed under
the direction of a controller using radar (ICAO).
Radar Contact
The situation which exists when the radar position of a particular
aircraft is seen and identified on a situation display (ICAO).
Reporting Point
A specified geographical location in relation to which the position
of an aircraft can be reported (ICAO).
Runway
A defined rectangular area on a land aerodrome prepared for the landing
and take-off of aircraft (ICAO).
Runway Visual Range
The range over which the pilot of an aircraft on the centre
line of a runway can expect to see the runway surface markings, or the lights
delineating the runway or identifying its centre line (ICAO).
SAFETYCOM
A common frequency (135.475MHz) made available for use at
aerodromes where no other frequency is allocated, to enable pilots to broadcast their
intentions to other aircraft that may be operating on, or in the vicinity of, the
aerodrome.
Signal Area
An area on an aerodrome used for the display of ground signals.
Significant Point
A specified geographical location used in defining an ATS route
or the flight path of an aircraft and for other navigational and ATS purposes (ICAO).
Special VFR Flight
A flight made at any time in a control zone which is Class A
airspace or is in any other control zone in IMC or at night, in respect of which the
appropriate air traffic control unit has given permission for the flight to be made in
accordance with special instructions given by that unit, instead of in accordance with
the Instrument Flight Rules and in the course of which flight the aircraft complies with
any instructions given by that unit and remains clear of cloud and with the surface in
sight (RoA).
31 March 2011
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