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the surface.
Aerodrome operating minima
The cloud ceiling and RVR for takeoff,
and the DH or MDH, RVR and
visual reference for landing, which
are minimum acceptable for the
operation of that aircraft at that
aerodrome.
Aerodrome traffic
That on the movement area of an
aerodrome and aircraft at or near it.
Aerodrome traffic zone
A 2 nm circular airspace round an
aerodrome notified for rule 39,
unless within that of a controlling
aerodrome, with the longest runway
less than 1850 metres, from the
surface to 2000 ft agl or msl when
offshore. If the longest runway is
greater than 1850 metres, the radius
of the circle becomes 2.5 nm.
Offshore, it is 1.5 nm.
Aeronautical beacon
An aeronautical ground light visible
continuously or intermittently to
designate a particular point on the
surface of the earth.
Aeronautical ground light
A light provided as an aid to air
navigation, other than one on an
aircraft.
Aeronautical radio station
A radio station on the surface,
transmitting or receiving signals to
assist aircraft.
Aeroplane
According to ICAO, "a power
driven heavier-than-air aircraft,
deriving its lift in flight chiefly from
aerodynamic reactions on surfaces
which remain fixed under given
conditions of flight".
AGL
Above Ground Level.
Air carrier
Any person operating a commercial
air service.
Aircraft
Any machine that can derive support
in the atmosphere from reactions of
the air, other than one designed to
derive support from reactions
against the earth’s surface of air
expelled from it, including a rocket.
Aircraft identification plate
A fireproof plate on an aircraft that
identifies it as a whole.
Aircraft Stand
Part of an apron for parking aircraft.
Air operator
The holder of an Air Operator
Certificate.
Glossary 263
Air operator certificate
A certificate issued by the
Authorities that authorizes its holder
to operate a commercial air service.
Airship
A power-driven, lighter-than-air
aircraft.
Air show
An aerial display or demonstration
before an invited assembly of people
by one or more aircraft.
Air time
For technical records, the time from
when an aircraft leaves the surface
until it comes into contact with it
again at the next point of landing.
Air traffic control unit
A person appointed by the CAA or
anyone else maintaining an
aerodrome or place, to give
instructions, advice or information
by radio to aircraft in the interests of
safety, but not including flight
information service officers.
Air transport undertaking
One whose business includes flights
for public transport of passengers or
cargo.
Airworthy
With regard to an aeronautical
product, in a fit and safe state for
flight, as per its type design.
Alternate aerodrome
One to which a flight may proceed
when landing at the destination is
inadvisable or impossible.
Altitude
The vertical distance of a level or a
point, measured from mean sea
level. It is represented by the QNH.
Annual costs
An estimate for the year beginning
the previous 1st of January, of the
costs of keeping, maintaining and
operating the aircraft, excluding
direct costs and those incurred
without a view to profit.
Annual flying hours
An estimate of the hours flown, or
to be flown, by an aircraft from the
previous 1st of January.
Approach control service
An ATC service for aircraft not
receiving an aerodrome control
service, that is nevertheless flying in,
or near an aerodrome traffic zone,
whether or not with visual reference.
Approach to landing
That portion of a flight below 1000
ft above the relevant DH or MDH.
Appropriate aeronautical radio
station
One serving the area in which an
aircraft is for the time being.
Appropriate air traffic control unit
Either that serving the area where an
aircraft is, or the area it intends to
enter and with which it must
communicate before entering.
Apron
Part of a land aerodrome for
accommodating aircraft for loading
and unloading passengers, cargo,
fuelling, parking or maintenance.
264 JAR Private Pilot Studies
APU
Auxiliary power unit. Any power unit
delivering rotating shaft power or
compressed air, or both, not
intended for direct propulsion of an
aircraft.
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