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conditions and noise sensitive areas in the proximity of the aerodrome.
PROCEDURE TURN
A manoeuvre in which a turn is made away by an aircraft to intercept and proceed
along the reciprocal of the designated track.
NOTE 1: Procedure turns are designated “left” or “right” according
to the direction of the initial turn.
NOTE 2: Procedure turns may be designated as being made either in level flight
or while descending, according to the circumstances or each individual
instrument approach procedure.
354
Civil Aviation Safety Authority Australia
INDEX
09/2001
5 SECTION
DEFINITIONS
QNH ALTIMETER SETTING
That pressure which, when placed on the pressure setting sub-scale of a sensitive
altimeter of an aircraft located at the reference point of an aerodrome, will cause the
altimeter to indicate the vertical displacement of the reference point above mean sea
level.
RADAR INFORMATION SERVICE (RIS)
An add-on ATC service within radar coverage which provides information to flights,
not otherwise receiving a separation service, in order to improve situation awareness
and assist pilots in avoiding collisions with other aircraft.
RADAR VECTORS
Navigational guidance to aircraft in the form of specific headings, based on the use of
radar.
REPETITIVE FLIGHT PLAN
A flight plan referring to a series of frequently recurring, regularly operated individual
flights with identical basic features, submitted by an operator for retention and
repetitive use by ATS units.
RESCUE COORDINATION CENTRE (RCC)
A centre that co-ordinates search and rescue within an assigned area.
RESCUE UNIT
A unit composed of trained personnel and provided with equipment suitable for the
expeditious conduct of search and rescue.
ROUTE
A way to be taken in flying from a departure to a destination aerodrome, specified in
terms of track and distance for each route segment.
RUNWAY (RWY)
A defined rectangular area on a land aerodrome prepared for the landing and take-off
of aircraft.
RUNWAY NUMBER
The number allotted to a runway end, being that whole number nearest
to one tenth of the magnetic bearing of the centerline of the runway measured
clockwise from magnetic north when viewed from the direction of approach. Single
numbers so obtained are preceded by “O” and where the final numeral of the
bearing is 5 degrees or greater, the number allocated is the next largest number.
RUNWAY STRIP (RWS)
The defined area, including the runway (and stopway if provided), intended both to
reduce the risk of damage to aeroplanes inadvertently running off the runway and to
protect aeroplanes flying over it during take-off, landing or missed approach. Apart
from the use of its runway, the area is not intended for taxi, take-off or landing
operations.
355
Civil Aviation Safety Authority Australia
INDEX
09/2001
5 SECTION
DEFINITIONS
SARTIME
The time nominated by a pilot for the initiation of SAR action if a report has not been
received by the nominated time.
SEARCH AND RESCUE (SAR)
The act of finding and returning to safety, aircraft and persons involved
in an emergency phase.
SEARCH AREA
The area in which an aircraft is believed to have crashed or forced-landed.
SEARCH AND RESCUE REGION
The specified area within which search and rescue is coordinated by
a particular Rescue Coordination Centre.
SEPARATION
• LONGITUDINAL SEPARATION: Longitudinal spacing of aircraft which
is never less than the prescribed standard interval. When using a time standard, the
interval between aircraft is calculated at the speed of the following aircraft;
• LATERAL SEPARATION: The lateral spacing of aircraft by requiring operation on
different routes, or in different geographical locations as determined by visual
observation or by use of radio or other navigation aids;
• VERTICAL SEPARATION: The vertical spacing of aircraft.
SIGNIFICANT POINT
A specified geographical location used in defining an ATS route or the flight path
of an aircraft and for other navigation and ATS purposes.
SOLE MEANS NAVIGATIONAL SYSTEM
A navigation system that, for a given phase of flight, must allow the aircraft to meet
all four navigation system performance requirements - accuracy, integrity, availability
and continuity. of service.
SUPPLEMENTAL MEANS NAVIGATION SYSTEM
A navigational system that must be used in conjunction with a sole means navigation
system.
SPECIAL VFR FLIGHT
A VFR flight authorised by ATC to operate within a control zone under meteorological
conditions below the visual meteorological conditions.
　
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