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aprons.
Meteorological ofice. An office designated to provide
meteorological service for international air navigation.
2411 1105
No. 43
Annex I1 - Air Tram Services Chapter I
Movement area. That part of an aerodrome to be used for the
take-off, landing and taxiing of aircraft, consisting of the
manoeuvring area and the apron(s).
NOTAM. A notice distributed by means of telecommunication
containing information concerning the establishment, condition
or change in any aeronautical facility, service,
procedure or hazard, the timely knowledge of which is
essential to personnel concerned with flight operations.
Obstacle. All fixed (whether temporary or permanent) and
mobile objects, or parts thereof, that are located on an area
intended for the surface movement of aircraft or that extend
above a defined surface intended to protect aircraft in
flight.
runway surface markings or the lights delineating the
runway or identifying its centre line.
SIGMET infunnation. Information issued by a meteorological
watch office concerning the occurrence or expected occurrence
of specified en-route weather phenomena which may
affect the safety of aircraft operations.
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.
Special VFRflight. A VFR flight cleared by air traffic control
to operate within a control zone in meteorological conditions
below VMC.
Operator. A person, organization or enterprise engaged in or Station declination. An alignment variation between the zero
offering to engage in an aircraft operation. degree radial of a VOR and true north, determined at the
time the VOR station is calibrated.
Pilot-in-command The pilot designated by the operator, or in
the case of general aviation, the owner, as being in com- Taxiing. Movement of an aircraft on the surface of an aeromand
and charged with the safe conduct of a flight. drome under its own power, excluding take-off and landing.
Printed communications. Communications which automati- ~ ~ , . , , ,cjo~nt~roll area. A control area normally established at
cally provide a permanent printed record at each terminal of the confluence of ATS routes in the vicinity of one or more
a circuit of all messages which pass over such circuit. major aerodromes.
Radiotelephony. A form of radiocommunication primarily The projection on the earth's of the of an
intended for the exchange of information in the form of aircraft, the direction of which path at any point is usually
speech. expressed in degrees from North (true, magnetic or grid).
Reporting point. A specified geographical location in relation Tmm avoidance advice. Advice provided by an air
to which the position of an aircraft can be reported. services unit specifying manoeuvres to assist a pilot to avoid
Required navigation performance (RNP). A statement of the
a collision.
ndaevfiingeadti oanir sppearcfoe.n &ce necessary for operation within a Traffic information. Information issued by an air traffic
services unit to alert a pilot to other known or observed air
Note.- Navigation performance and requirements are traffic which may be in proximity to the position or
defined for a particular RNP type &or application. intended route of flight and to help the pilot avoid a
collision.
Rescue coordination centre. A unit responsible for promoting
efficient organization of search and rescue services and for Transfer of control pint. A defined point located along the
coordinating the conduct of search and rescue operations flight path of an aircraft, at which the responsibility for prowithin
a search and rescue region. viding air traffic control service to the aircraft is transferred
from one control unit or control position to the next.
RNP type. A containment value expressed as a distance in
nautical miles from the intended position within which Transfenfng unit. Air traffic control unit in the process of
flights would be for at least 95 per cent of the total flying transferring the responsibility for providing air traffic contime.
trol service to an aircraft to the next air traffic control unit
along the route of flight.
Example.- RNP 4 represents a navigation accuracy of plus
or minus 7.4 km (4 NM) on a 95 per cent containment basis. Cl"certarh0 phse. A situation wherein uncertainty exists as
to the safety of an aircraft and its occupants.
Runway. A defined rectangular area on a land aerodrome
prepared for the landing and take-off of aircraft. VFR. The symbol used to designate the visual flight rules.
Runway visual mnge (RVR). The range over which the pilot VFR fright A flight conducted in accordance with the visual
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