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vehicle of which it is part. Suitably integrated, these forces provide velocity
and thence position information.
Instrument Approach and Landing Operations: Instrument approach and
landing operations are classified as follows:
a. Non-precision Approach and Landing Operations: Instrument
approaches and landings which do not utilise electronic glide path
guidance.
b. Precision Approach and Landing Operations: Instrument
approaches and landings using precision azimuth and glide path
guidance with minima as determined by the category of operation.
Categories of Precision Approach and Landing Operations are:
(i) Category I (CAT I) operation. A precision instrument approach
and landing with a decision height not lower than 200FT and a
visibility not less than 800M, or a RVR not less than 550M.
(ii) Category Il (CAT II) operation: A precision instrument approach
and landing with a decision height lower than 200FT but not lower
than 100FT, and a runway visual range not less than 350M.
(iii) Category IIIA (CAT IIIA) operation: A precision instrument
approach and landing with a decision height lower than 100FT, or
no decision height and a runway visual range not less than 200M.
(iv) Category IIIB (CAT IIIB) operation: A precision instrument
approach and landing with either, a decision height lower than
50FT, or with no decision height and a runway visual range less
than 200M but not less than 50M.
GEN TOC ENR TOC AD TOC Index
GEN (GENERAL) A/L 45 effective 24 NOV 05
(v) Category lllC (CAT lllC) operation: A precision instrument
approach and landing with no decision height and no runway
visual range limitations.
Instrument Approach Procedure: A series of predetermined manoeuvres
by reference to flight instruments with specified protection from obstacles from
the initial approach fix or where applicable, from the beginning of a defined
arrival route to a point from which a landing can be completed and thereafter, if
a landing is not completed, to a position at which holding or en route obstacle
clearance criteria apply.
Intermediate Fix (IF): A fix on an RNAV approach that marks the end of an
initial segment and the beginning of the intermediate segment.
Initial Approach Fix (IAF): The fix at the commencement of an instrument
approach.
Initial Approach Segment: That segment of an instrument approach
procedure between the initial approach fix and the intermediate approach fix
or, where applicable, the final approach fix or point.
Instrument Landing System (ILS): A precision instrument approach system
which normally consists of the following electronic components: VHF
Localiser, UHF Glideslope, VHF Marker Beacons.
Instrument Runway: One of the following types of runways intended for the
operation of aircraft using instrument approach procedures:
a. Non-precision approach runway. An instrument runway served by
visual aids and a non-visual aid providing at least directional guidance
adequate for a straight-in approach.
b. Precision approach runway, CAT I. An instrument runway served by lLS
and visual aids intended for operations with a decision height not lower
than 200FT and either a visibility not less than 800M, or a RVR not less
than 550M.
c. Precision approach runway, CAT Il. An instrument runway served by
lLS and visual aids intended for operations with a decision height lower
than 200FT, but not lower than 100FT and a RVR not less than 350M.
d. Precision approach runway, CAT Ill. An instrument runway served by
ILS to and along the surface of the runway and:
(i) for CAT IIIA – intended for operations with a decision height lower
than 100FT, or no decision height and a RVR not less than 200M;
(ii) for CAT IIIB – intended for operations with a decision height lower
than 50FT, or no decision height and a RVR less than 200M, but
not less than 50M;
GEN TOC ENR TOC AD TOC Index
GEN (GENERAL) A/L 45 effective 24 NOV 05
(iii) for CAT IIIC – intended for operations with no decision height and
no RVR limitations.
Integrated Aeronautical Information Package: A package which consists
of the following elements:
AIP, including amendment service;
supplements to the AIP;
NOTAM and Preflight Information Bulletins (PIBs);
AIC; and
checklists and summaries.
Integrity: That quality which relates to the trust which can be placed in the
correctness of information supplied by a system. It includes the ability of a
system to provide timely warnings to users when the system should not be
used for navigation.
Intermediate Approach Segment: That segment of an instrument approach
procedure between either the intermediate approach fix and the final approach
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