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specified area or portion of airspace.
FORECASTER
A Weather Officer designated by the Bureau of Meteorology to prepare and issue
forecasts of meteorological conditions.
FORMATION
Two or more aircraft flown in close proximity to each other and operating as a
single aircraft with regard to navigation, position reporting and control.
NOTE: Refer CAR 163AA for conditions under which formation flight may be
undertaken.
FULL EMERGENCY
(In the context of aerodrome emergency plans) - A situation in which the response
of all agencies involved in the Aerodrome Emergency Plan will be activated. A full
emergency will be declared when an aircraft approaching the airport is known or
suspected to be in such trouble that there is danger of an accident.
GRIB
Processed data in the form of grid-point values expressed in binary form. [Wind and
temperature values derived from World Area Forcast System (WAFS) models are
input to NAIPS and automated flight planning systems in GRIB format].
GROSS WEIGHT
The weight of the aircraft together with the weight of all persons and goods
(including fuel) on board the aircraft at the time.
HARD SURFACE
A surface comprised of asphalt, concrete, bitumen, tar stone covered, tar bound
pavements, compacted gravel or coral. It does not include any grass or natural
350 surface.
Civil Aviation Safety Authority Australia
INDEX
09/2001
5 SECTION
DEFINITIONS
HAZARDOUS CONDITIONS
Meteorological conditions which may endanger aircraft or adversely affect their safe
operation, including, but not limited to, dust-storms, icing, thunderstorms,
linesqualls, blizzards, sandstorms, severe storms of tropical or sub-tropical origin,
other severe or turbulent conditions, abnormal conditions of sea and sea swell,
widespread conditions of fog, low cloud and low visibility, heavy precipitation,
freezing precipitation and hail.
HEADING
The direction in which the longitudinal axis of an aircraft is pointed, usually
expressed in degrees from North (true, magnetic, compass or grid).
HEIGHT
• The vertical distance of a level, a point or an object considered as a point
measured from a specified datum or;
• The vertical dimension of an object.
HOLD SHORT LINE
A line marked across a runway, in accordance with the requirements of AIP AD,
at which landing aircraft must stop when required during land and hold short
operations (LAHSO). The line shall not be closer than 75M to the intersecting
runway centreline.
HOLDING BAY
An enlargement or special arrangement of a taxiway, provided near the runway end
to permit aircraft to hold without obstructing the passage of other aircraft on the
taxiway.
HOLDING POINT
A specified location identified by visual or other means in the vicinity of which the
position of an aircraft in flight is maintained in accordance with ATC instructions.
Note: Caution, taxiways may also include a holding point.
HOLDING PROCEDURE
A predetermined manoeuvre which keeps an aircraft within a specified airspace
whist awaiting further clearance.
NOTE: Clearance not applicable OCTA.
LAND
In relation to a helicopter, means to lower the helicopter to bring the undercarriage
in contact with a surface.
LAND AND HOLD SHORT OPERATIONS
A procedure involving dependent operations conducted on two intersecting
runways whereby aircraft land and depart on one runway while aircraft landing on
the other runway hold short of the intersection.
351
Civil Aviation Safety Authority Australia
INDEX
09/2001
5 SECTION
DEFINITIONS
LANDING AREA
That part of the movement area intended for the landing or take-off of aircraft.
LANDING DISTANCE AVAILABLE (LDA)
The length of runway which is declared by the State to be available and suitable for
the ground landing run of an aeroplane. The landing distance available commences
at the threshold and in most cases corresponds to the physical length of the runway
pavement. However, the threshold may be displaced from the end of the pavement
when it is considered necessary to make a corresponding displacement of the
approach area and surface by reason of obstructions in the approach path to the
runway.
LENGTH (LEN)
In relation to a helicopter, means the total length of the helicopter (including its
rotors).
LEVEL (LVL)
A generic term relating to the vertical position of an aircraft in flight and meaning
altitude or flight level.
LICENSED AERODROME means a place that is:
• Licensed as a aerodrome under the Civil Aviation Regulations, or
• Established as an aerodrome under the Air Navigation Regulations.
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