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within a search and rescue region.
RNP type. A containment value expressed as a distance in
nautical miles from the intended position within which
flights would be for at least 95 per cent of the total flying
time.
Example.- RNP 4 represents a navigation accuracy of plus
or minus 7.4 km (4 NM) on a 95 per cent containment basis.
Runway. A defined rectangular area on a land aerodrome
prepared for the landing and take-off of aircraft.
Terminal control area. A control area normally established at
Llle cor~fluence of ATS routes in the vicinity of one or more
major aerodromes.
Track. The projection on the earth's surface of the path of an
aircraft, the direction of which path at any point is usually
expressed in degrees from North (true, magnetic or grid).
Traffic avoidance advice. Advice provided by an air traffic
services unit specifying manoeuvres to assist a pilot to
avoid a collision.
Traffic information. Information issued by an air traffic
services unit to alert a pilot to other known or observed air
traffic which may be in proximity to the position or
intended route of flight and to help the pilot avoid a
collision.
Transfer of control point A defined point located along the
flight path of an aircraft, at which the responsibility for
providing air traffic control service to the aircraft is transferred
from one control unit or control position to the next.
Transferring unit. Air traffic control unit in the process of
transferring the responsibility for providing air traffic
control service to an aircraft to the next air traffic control
unit along the route of flight.
Uncertainty phase. A situation wherein uncertainty exists as
to the safety of an aircraft and its occupants.
Runway vkual range (RVR). The range over which the pilot
of an aircraft on the centre line of a runway can see the VFR. The symbol used to designate the visual flight rules.
runway surface markings or the lights delineating the
runway or identifying its centre line. VFR flight. A flight conducted in accordance with the visual
flight rules.
SZGMET information. Information issued by a meteorological Vkual meteorological conditions (VMq. Meteorological
watch office concerning the occurrence or expected occur- conditions expressed in terms of visibility, distance from
rence of specified en-route weather phenomena which may cloud, and ceiling, equal to or better than specified minima.
affect the safety of aircraft operations.
SigniJicant 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.
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.
Tnriing. Movement of an aircraft on the surface of an aerodrome
under its own power, excluding take-off and
landing.
Note.- The specified minima are contained in Annex 2.
VMC. The symbol used to designate visual meteorological
conditions.
Waypoint. A specified geographical location used to define an
area navigation route or the flight path of an aircraft
employing area navigation. Waypoints are identified as
either:
Fly-by waypoint. A waypoint which rcquircs turn anticipation
to allow tangential interception of the next
segment of a route or procedure, or
Flyover waypoint. A waypoint at which a turn is initiated in
order to join the next segment of a route or procedure.
CHAPTER 2. GENERAL
2.1 Establishment of authority
2.1.1 Contracting States shall determine, in accordance
with the provisions of this Annex and for the territories over
which they have jurisdiction, those portions of the airspace and
those aerodromes where air traffic services will be provided.
They shall thereafter arrange for such services to be
established and provided in accordance with the provisions of
this Annex, except that, by mutual agreement, a State may
delegate to another State the responsibility for establishing and
providing air traffic services in flight information regions,
control areas or control zones extending over the territories of
the former.
Note.- I f one State delegates to another State the
responsibility for the provision of air trafSic services over its
territory, it does so without derogation of its national sovereignty.
Similarly, the providing State's responsibility is limited
to technical and operational considerations and does not
　
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