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route structure. There are two types of DP, Obstacle
Departure Procedure (ODP), printed either textually
or graphically, and, Standard Instrument Departure
(SID), which is always printed graphically.
(See IFR TAKEOFF MINIMUMS AND
DEPARTURE PROCEDURES.)
(See OBSTACLE DEPARTURE PROCEDURES.)
(See STANDARD INSTRUMENT DEPARTURES.)
(Refer to AIM.)
INSTRUMENT DEPARTURE PROCEDURE (DP)
CHARTS−
(See AERONAUTICAL CHART.)
INSTRUMENT FLIGHT RULES− Rules governing
the procedures for conducting instrument flight. Also
a term used by pilots and controllers to indicate type
of flight plan.
(See INSTRUMENT METEOROLOGICAL
CONDITIONS.)
(See VISUAL FLIGHT RULES.)
(See VISUAL METEOROLOGICAL
CONDITIONS.)
(See ICAO term INSTRUMENT FLIGHT
RULES.)
(Refer to AIM.)
INSTRUMENT FLIGHT RULES [ICAO]− A set of
rules governing the conduct of flight under instrument
meteorological conditions.
Pilot/Controller Glossary 8/5/04
PCG I−4
INSTRUMENT LANDING SYSTEM− A precision
instrument approach system which normally consists
of the following electronic components and visual
aids:
a. Localizer.
(See LOCALIZER.)
b. Glideslope.
(See GLIDESLOPE.)
c. Outer Marker.
(See OUTER MARKER.)
d. Middle Marker.
(See MIDDLE MARKER.)
e. Approach Lights.
(See AIRPORT LIGHTING.)
(Refer to 14 CFR Part 91.)
(Refer to AIM.)
INSTRUMENT METEOROLOGICAL CONDITIONS−
Meteorological conditions expressed in
terms of visibility, distance from cloud, and ceiling
less than the minima specified for visual meteorological
conditions.
(See INSTRUMENT FLIGHT RULES.)
(See VISUAL FLIGHT RULES.)
(See VISUAL METEOROLOGICAL
CONDITIONS.)
INSTRUMENT RUNWAY− A runway equipped
with electronic and visual navigation aids for which
a precision or nonprecision approach procedure
having straight-in landing minimums has been
approved.
(See ICAO term INSTRUMENT RUNWAY.)
INSTRUMENT RUNWAY [ICAO]− One of the
following types of runways intended for the operation
of aircraft using instrument approach procedures:
a. Nonprecision Approach Runway−An instrument
runway served by visual aids and a nonvisual
aid providing at least directional guidance adequate
for a straight-in approach.
b. Precision Approach Runway, Category I−An
instrument runway served by ILS and visual aids
intended for operations down to 60 m (200 feet)
decision height and down to an RVR of the order of
800 m.
c. Precision Approach Runway, Category II−An
instrument runway served by ILS and visual aids
intended for operations down to 30 m (100 feet)
decision height and down to an RVR of the order of
400 m.
d. Precision Approach Runway, Category III−An
instrument runway served by ILS to and along the
surface of the runway and:
1. Intended for operations down to an RVR of
the order of 200 m (no decision height being
applicable) using visual aids during the final phase of
landing;
2. Intended for operations down to an RVR of
the order of 50 m (no decision height being
applicable) using visual aids for taxiing;
3. Intended for operations without reliance on
visual reference for landing or taxiing.
Note 1: See Annex 10 Volume I, Part I, Chapter 3,
for related ILS specifications.
Note 2: Visual aids need not necessarily be
matched to the scale of nonvisual aids provided.
The criterion for the selection of visual aids is the
conditions in which operations are intended to be
conducted.
INTEGRITY− The ability of a system to provide
timely warnings to users when the system should not
be used for navigation.
INTERMEDIATE APPROACH SEGMENT−
(See SEGMENTS OF AN INSTRUMENT
APPROACH PROCEDURE.)
INTERMEDIATE APPROACH SEGMENT
[ICAO]− That segment of an instrument approach
procedure between either the intermediate approach
fix and the final approach fix or point, or between the
end of a reversal, race track or dead reckoning track
procedure and the final approach fix or point, as
appropriate.
INTERMEDIATE FIX− The fix that identifies the
beginning of the intermediate approach segment of an
instrument approach procedure. The fix is not
normally identified on the instrument approach chart
as an intermediate fix (IF).
(See SEGMENTS OF AN INSTRUMENT
APPROACH PROCEDURE.)
INTERMEDIATE LANDING− On the rare occasion
that this option is requested, it should be approved.
The departure center, however, must advise the
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