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CG position appropriate to the maximum gross apron (ramp)
mass is used to calculate the ACN. In exceptional cases the
forwardmost CG position may result in the nose gear loading
being more critical.
Aircrarfr stand A designated area on an apron intended to be
used for parking an aircraft.
Apron. A defined area, on a land aerodrome, intended to
accommodate aircraft for purposes of loading or unloading
passengers, mail or cargo, fuelling, parking or maintenance.
Apron management service. A service provided to regulate
the activities and the movement of aircraft and vehicles on
an apron.
Barrette. Three or more aeronautical ground lights closely
spaced in a transverse line so that from a distance they
appear as a short bar of light.
Calendar. Discrete temporal reference system that provides
the basis for defining temporal position to a resolution of
one day (IS0 191 08*).
Capacitor discharge light. A lamp in which high-intensity
flashes of extremely short duration are produced by the
discharge of electricity at high voltage through a gas
enclosed in a tube.
Certried aerodrome. An aerodrome whose operator has been
granted an aerodrome certificate.
Clearnay. A defined rectangular area on the ground or water
under the control of the appropriate authority, selected or
prepared as a suitable area over which an aeroplane may
make a portion of its initial climb to a specified height.
Cyclic redundancy check (CRC). A mathematical algorithm
applied to the digital expression of data that provides a
level of assurance against loss or alteration of data.
Data quality. A degree or level of confidence that the data
provided meet the requirements of the data user in terms of
accuracy, resolution and integrity.
Datum. Any quantity or set of quantities that may serve as a
reference or basis for the calculation of other quantities
(IS0 19 104*).
De-icindanti-icing facility. A facility where frost, ice or snow
is removed (de-icing) from the aeroplane to provide clean
surfaces, and/or where clean surfaces of the aeroplane
receive protection (anti-icing) against the formation of frost
or ice and accumulation of snow or slush for a limited
period of time.
Note.- Further guidance b given in the Manual of Aircraft
Ground De-icindAnti-icing Operations (Doc 9640).
De-icinghti-icing pad An area comprising an inner area for
the parking of an aeroplane to receive de-icinglanti-icing
treatment and an outer area for the manoeuvring of two or
more mobile de-icindanti-icing equipment.
Declared distances.
a) Take-off run available (TOM). The length of runway
declared available and suitable for the ground run of an
aeroplane taking off.
b) Take-off dbtance available (TODA). The length of the
take-off run available plus the length of the clearway, if
provided.
All IS0 Standards are listed at the end of this chapter.
Chapter 1 Annex 14 -Aerodromes
Road An established surface route on the movement area
meant for the exclusive use of vehicles.
Road-holding position. A designated position at which
vehicles may be required to hold.
Runway. A defined rectangular area on a land aerodrome
prepared for the landing and take-off of aircraft.
Runway end safety area (RESA). An area symmetrical about
the extended runway centre line and adjacent to the end of
the ship primarily intended to reduce the risk of damage to
an aeroplane undershooting or overrunning the runway.
Runway guard lights. A light system intended to caution
pilots or vehicle drivers that they are about to enter an
active runway.
Runway-holding position. A designated position intended to
protect a runway, an obstacle limitation surface, or an ILSI
MLS criticallsensitive area. at which taxiing aircraft and
vehicles shall stop and hold, unless otherwise authorized by
the a d r o m e control tower.
Note.- In radiotelephony phraseologies, the expression
"holding point" is used to designate the runway-holding
position.
Runway strip. A defined area including the runway and
stopway, if provided, intended:
a) to reduce the risk of damage to aircraft running off a
runway; and
b) to protect aircraft flying over it during take-off or
landing operations.
Runway turn pad A defined area on a land aerodrome
adjacent to a nmway for the purpose of completing a
180-degree turn on a runway.
Runway visual range (RV9. The range over which the pilot
of an aircraft on the centre line of a runway can see the
runway surface markings or the lights delineating the
runway or identifying its centre line.
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