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other non-technical factors that need to be considered in the
development of an aerodrome. Information on these subjects is
included in the Airport Planning Manual (Doc 9184), Part 1.
Guidance material on the environmental aspects of the development
and operation of an aerodrome is included in the Airport
Planning Manual, Part 2.
Aviation security is an integral part of aerodrome planning
and operations. Annex 14, Volume I, contains several
specifications aimed at enhancing the level of security at
aerodromes. Specifications on other facilities related to
security are given in Annex 17 and detailed guidance on the
subject is contained in the ICAO Security Manual.
1.1 Definitions
When the following terms are used in this Annex they have the
following meanings:
Accuracy. A degree of conformance between the estimated or
measured value and the true value.
Note.— For measured positional data, the accuracy is
normally expressed in terms of a distance from a stated
position within which there is a defined confidence of the true
position falling.
Aerodrome. A defined area on land or water (including any
buildings, installations and equipment) intended to be used
either wholly or in part for the arrival, departure and
surface movement of aircraft.
Aerodrome beacon. Aeronautical beacon used to indicate the
location of an aerodrome from the air.
Aerodrome certificate. A certificate issued by the appropriate
authority under applicable regulations for the operation of
an aerodrome.
Aerodrome elevation. The elevation of the highest point of the
landing area.
Aerodrome identification sign. A sign placed on an aerodrome
to aid in identifying the aerodrome from the air.
Aerodrome reference point. The designated geographical
location of an aerodrome.
Aerodrome traffic density.
a) Light. Where the number of movements in the mean
busy hour is not greater than 15 per runway or typically
less than 20 total aerodrome movements.
b) Medium. Where the number of movements in the mean
busy hour is of the order of 16 to 25 per runway or
typically between 20 to 35 total aerodrome movements.
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Annex 14 — Aerodromes Volume I
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c) Heavy. Where the number of movements in the mean
busy hour is of the order of 26 or more per runway or
typically more than 35 total aerodrome movements.
Note 1.— The number of movements in the mean busy hour
is the arithmetic mean over the year of the number of
movements in the daily busiest hour.
Note 2.— Either a take-off or a landing constitutes a
movement.
Aeronautical beacon. An aeronautical ground light visible
at all azimuths, either continuously or intermittently, to
designate a particular point on the surface of the earth.
Aeronautical ground light. Any light specially provided as an
aid to air navigation, other than a light displayed on an
aircraft.
Aeroplane reference field length. The minimum field length
required for take-off at maximum certificated take-off
mass, sea level, standard atmospheric conditions, still air
and zero runway slope, as shown in the appropriate
aeroplane flight manual prescribed by the certificating
authority or equivalent data from the aeroplane manufacturer.
Field length means balanced field length for
aeroplanes, if applicable, or take-off distance in other cases.
Note.— Attachment A, Section 2 provides information on
the concept of balanced field length and the Airworthiness
Manual (Doc 9760) contains detailed guidance on matters
related to take-off distance.
Aircraft classification number (ACN). A number expressing
the relative effect of an aircraft on a pavement for a
specified standard subgrade category.
Note.— The aircraft classification number is calculated
with respect to the center of gravity (CG) position which yields
the critical loading on the critical gear. Normally the aftmost
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.
Aircraft 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.
Balked landing. A landing manoeuvre that is unexpectedly
　
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