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Safety management system A system for the management of
safety at aerodromes, including the organizational structure,
responsibilities, procedures, processes and provisions for
the implementation of aerodrome safety policies by an
aerodrome operator, which provides for control of safety at,
and the safe use of, the aerodrome.
Segregated parallel operations. Simultaneous operations on
parallel or near-parallel instrument runways in which one
runway is used exclusively for approaches and the other
runway is used exclusively for departures.
Shoulder. An area adjacent to the edge of a pavement so
prepared as to provide a transition between the pavement
and the adjacent surface.
Sign.
a) Fixed message sign. A sign presenting only one message.
b) Variable message sign. A sign capable of presenting several
pnxkkmnned messages or no message, as applicable.
Signal area. An area on an aerodrome used for the display of
ground signals.
Slush. Water-saturated snow which with a heel-and-toe slapdown
motion against the ground will be displaced with a
splatter; specific gravity: 0.5 up to 0.8.
Note.- Combinations of ice, snow andor standing water
may, especially when rain, rain and snow, or snow is falling,
produce substances with specific gravities in excess of 0.8.
These substances, due to their high waterhce content, will
have a transparent rather than a cloudy appearance and, at
the higher specifc gravities, will be readily distinguishable
fiom slush.
Snow (on the ground).
a) Dry snow. Snow which can be blown if loose or, if
compacted by hand, will fall apart again upon release;
specific gravity: up to but not including 0.35.
b) Wet snow. Snow which, if compacted by hand, will stick
together and tend to or form a snowball; specific
gravity: 0.35 up to but not including 0.5.
c) Compacted snow. Snow which has been compressed
into a solid mass that resists further compression and
will hold together or break up into lumps if picked up;
specific gravity: 0.5 and over.
Station declination An alignment variation between the zero
degree radial of a VOR and true north, determined at the
time the VOR station is calibrated.
Stopway. A defined rectangular area on the ground at the end
of take-off run available prepared as a suitable area in which
an aircraft can be stopped in the case of an abandoned
take off.
Switch-over time (light). The time required for the actual
intensity of a light measured in a given direction to fall
from 50 per cent and recover to 50 per cent during a power
supply changeover, when the light is being operated at
intensities of 25 per cent or above.
Take-off runway. A runway intended for take-off only.
Tariway. A defined path on a land aerodrome established
forthe taxiing of aircraft and intended to provide a
link between one part of the aerodrome and another,
including:
24/11/05
No. 7
Annex 14 -Aerodromes Volume I
a) Aircrafl stand taxilane. A portion of an apron designated 1.2.3 Wherever a colour is referred to in this Annex, the
as a taxiway and intended to provide access to aircraft specifications for that colour given in Appendix 1 shall apply.
stands only.
b) Apron taxiway. A portion of a taxiway system located
on an apron and intended to provide a th~oughta xi route
across the apron.
13 Common reference systems
1.3.1 Horizontal reference system
c) Rapid exit taxiway. A taxiway connected to a runway at
an acute angle and designed to allow landing aeroplanes
to turn off at higher speeds than are achieved on other
exit taxiways thereby minimizing runway occupancy
times.
Taxiway intersection A junction of two or more taxiways.
Taxiway slrip. An area including a taxiway intended to protect
an aircraft operating on the taxiway and to reduce the risk
of damage to an aircraft accidentally running off the
taxiway.
World Geodetic System - 1984 (WGS-84) shall be used as
the horizontal (geodetic) reference system. Reported
aeronautical geographical coordinates (indicating latitude and
longitude) shall be expressed in terms of the WGS-84 geodetic
reference datum.
Note.- Comprehensive guidance material concerning
WGS-84 is contained in the World Geodetic System - 1984
(WGS-84) Manual (Doc 9674).
1.3.2 Vertical reference system
Threshold The beginning of that portion of the runway usable
for landing. Mean sea level (MSLI datum. which gives the relations hi^ of
gravity-related heightx (elevation) to a surface known as' the
Touchdown zone The portion a runway, beyond the geoid, shall be used as the vertical reference system.
　
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