|
I
I SAY AGAIN-
The message will be repeated.
IAF-
(See INITIAL APPROACH FIX.)
IAP-
(See INSTRUMENT APPROACH
PROCEDURE.)
IAWP- Initial Approach Waypoint
ICAO-
(See ICAO
Term INTERNATIONAL CIVIL AVIATION ORGANIZATION.)
ICING- The accumulation of
airframe ice.
Types of icing are:
a. Rime Ice- Rough, milky, opaque ice
formed by the instantaneous freezing of small supercooled water
droplets.
b. Clear Ice- A glossy, clear, or
translucent ice formed by the relatively slow freezing or large
supercooled water droplets.
c. Mixed- A mixture of clear ice and rime
ice.
Intensity of icing:
a. Trace- Ice becomes perceptible. Rate of
accumulation is slightly greater than the rate of sublimation.
Deicing/anti-icing equipment is not utilized unless encountered for
an extended period of time (over 1 hour).
b. Light- The rate of accumulation may
create a problem if flight is prolonged in this environment (over 1
hour). Occasional use of deicing/anti-icing equipment
removes/prevents accumulation. It does not present a problem if the
deicing/anti-icing equipment is used.
c. Moderate- The rate of accumulation is
such that even short encounters become potentially hazardous and use
of deicing/anti-icing equipment or flight diversion is necessary.
d. Severe- The rate of accumulation is
such that deicing/anti-icing equipment fails to reduce or control
the hazard. Immediate flight diversion is necessary.
IDENT- A request
for a pilot to activate the aircraft transponder identification
feature. This will help the controller to confirm an aircraft identity
or to identify an aircraft.
(Refer to AIM.)
IDENT FEATURE- The
special feature in the Air Traffic Control Radar Beacon System (ATCRBS)
equipment. It is used to immediately distinguish one displayed beacon
target from other beacon targets.
(See IDENT.)
IF-
(See INTERMEDIATE FIX.)
IFIM-
(See INTERNATIONAL
FLIGHT INFORMATION MANUAL.)
IF NO TRANSMISSION
RECEIVED FOR (TIME)- Used by ATC in radar approaches to
prefix procedures which should be followed by the pilot in event of
lost communications.
(See LOST COMMUNICATIONS.)
IFR-
(See INSTRUMENT FLIGHT RULES.)
IFR AIRCRAFT- An
aircraft conducting flight in accordance with instrument flight rules.
IFR CONDITIONS-
Weather conditions below the minimum for flight under visual flight
rules.
(See INSTRUMENT
METEOROLOGICAL CONDITIONS.)
IFR DEPARTURE PROCEDURE-
(See IFR
TAKEOFF MINIMUMS AND DEPARTURE PROCEDURES.)
(Refer to AIM.)
IFR FLIGHT-
(See IFR AIRCRAFT.)
IFR LANDING MINIMUMS-
(See
LANDING MINIMUMS.)
IFR
MILITARY TRAINING ROUTES (IR)- Routes used by the Department of
Defense and associated Reserve and Air Guard units for the purpose of
conducting low-altitude navigation and tactical training in both IFR
and VFR weather conditions below 10,000 feet MSL at airspeeds in
excess of 250 knots IAS.
IFR TAKEOFF
MINIMUMS AND DEPARTURE PROCEDURES- Title 14 Code of Federal
Regulations Part 91, prescribes standard takeoff rules for certain
civil users. At some airports, obstructions or other factors require
the establishment of nonstandard takeoff minimums, departure
procedures, or both to assist pilots in avoiding obstacles during
climb to the minimum en route altitude. Those airports are listed in
FAA/DOD Instrument Approach Procedures (IAPs) Charts under a section
entitled "IFR Takeoff Minimums and Departure Procedures." The FAA/DOD
IAP chart legend illustrates the symbol used to alert the pilot to
nonstandard takeoff minimums and departure procedures. When departing
IFR from such airports or from any airports where there are no
departure procedures, DPs, or ATC facilities available, pilots should
advise ATC of any departure limitations. Controllers may query a pilot
to determine acceptable departure directions, turns, or headings after
takeoff. Pilots should be familiar with the departure procedures and
must assure that their aircraft can meet or exceed any specified climb
gradients.
IF/IAWP- Intermediate
Fix/Initial Approach Waypoint. The waypoint where the final approach
course of a T approach meets the crossbar of the T. When designated
(in conjunction with a TAA) this waypoint will be used as an IAWP when
approaching the airport from certain directions, and as an IFWP when
beginning the approach from another IAWP.
IFWP- Intermediate Fix Waypoint
ILS-
(See INSTRUMENT LANDING SYSTEM.)
ILS CATEGORIES- 1. ILS
Category I. An ILS approach procedure which provides for approach to a
height above touchdown of not less than 200 feet and with runway
visual range of not less than 1,800 feet.- 2. ILS Category II. An ILS
approach procedure which provides for approach to a height above
touchdown of not less than 100 feet and with runway visual range of
not less than 1,200 feet.- 3. ILS Category III:
a. IIIA.-An ILS approach procedure which
provides for approach without a decision height minimum and with
runway visual range of not less than 700 feet.
b. IIIB.-An ILS approach procedure which
provides for approach without a decision height minimum and with
runway visual range of not less than 150 feet.
c. IIIC.-An ILS approach procedure which
provides for approach without a decision height minimum and without
runway visual range minimum.
ILS PRM APPROACH- An
instrument landing system (ILS) approach conducted to parallel runways
whose extended centerlines are separated by less than 4,300 feet and
the parallel runways have a Precision Runway Monitoring (PRM) system
that permits simultaneous independent ILS approaches.
IM-
(See INNER MARKER.)
IMC-
(See INSTRUMENT
METEOROLOGICAL CONDITIONS.)
IMMEDIATELY-
Used by ATC or pilots when such action compliance is required to
avoid an imminent situation.
INCERFA (Uncertainty Phase) [ICAO]- A situation wherein
uncertainty exists as to the safety of an aircraft and its occupants.
INCREASE SPEED TO (SPEED)-
(See
SPEED ADJUSTMENT.)
INERTIAL
NAVIGATION SYSTEM- An RNAV system which is a form of
self-contained navigation.
(See
AREA NAVIGATION (RNAV.)
INFLIGHT REFUELING-
(See
AERIAL REFUELING.)
INFLIGHT WEATHER ADVISORY-
(See
WEATHER ADVISORY.)
INFORMATION REQUEST-
A request originated by an FSS for information concerning an overdue
VFR aircraft.
INITIAL APPROACH FIX-
The fixes depicted on instrument approach procedure charts that
identify the beginning of the initial approach segment(s).
(See FIX.)
(See SEGMENTS OF AN INSTRUMENT APPROACH PROCEDURE.)
INITIAL APPROACH SEGMENT-
(See SEGMENTS OF AN INSTRUMENT APPROACH PROCEDURE.)
INITIAL
APPROACH SEGMENT [ICAO]- 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.
INLAND
NAVIGATION FACILITY- A navigation aid on a North American Route at
which the common route and/or the noncommon route begins or ends.
INNER MARKER- A marker
beacon used with an ILS (CAT II) precision approach located between
the middle marker and the end of the ILS runway, transmitting a
radiation pattern keyed at six dots per second and indicating to the
pilot, both aurally and visually, that he/she is at the designated
decision height (DH), normally 100 feet above the touchdown zone
elevation, on the ILS CAT II approach. It also marks progress during a
CAT III approach.
(See INSTRUMENT LANDING SYSTEM.)
(Refer to AIM.)
INNER MARKER BEACON-
(See INNER MARKER.)
INREQ-
(See INFORMATION REQUEST.)
INS-
(See INERTIAL NAVIGATION
SYSTEM.)
INSTRUMENT APPROACH-
(See INSTRUMENT APPROACH
PROCEDURE.)
INSTRUMENT
APPROACH PROCEDURE- A series of predetermined maneuvers for the
orderly transfer of an aircraft under instrument flight conditions
from the beginning of the initial approach to a landing or to a point
from which a landing may be made visually. It is prescribed and
approved for a specific airport by competent authority.
(See SEGMENTS OF AN INSTRUMENT APPROACH PROCEDURE.)
(Refer to
14 CFR Part 91.)
(Refer to AIM.)
a. U.S. civil standard instrument approach
procedures are approved by the FAA as prescribed under 14 CFR Part
97 and are available for public use.
b. U.S. military standard instrument
approach procedures are approved and published by the Department of
Defense.
c. Special instrument approach procedures
are approved by the FAA for individual operators but are not
published in 14 CFR Part 97 for public use.
(See ICAO term
INSTRUMENT APPROACH PROCEDURE.)
INSTRUMENT APPROACH PROCEDURE [ICAO]- A series of predetermined
maneuvers 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.
INSTRUMENT APPROACH PROCEDURES CHARTS-
(See
AERONAUTICAL CHART.)
INSTRUMENT DEPARTURE PROCEDURE (DP)- A preplanned instrument
flight rule (IFR) air traffic control departure procedure printed for
pilot use in graphic and/or textual form. DPs provide transition from
the terminal to the appropriate en route structure.
(See IFR
TAKEOFF MINIMUMS AND DEPARTURE PROCEDURES.)
(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.
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 ATCSCC so
that the appropriate delay is carried over and assigned at the
intermediate airport. An intermediate landing airport within the
arrival center will not be accepted without coordination with and the
approval of the ATCSCC.
INTERNATIONAL
AIRPORT- Relating to international flight, it means:
a. An airport of entry which has been
designated by the Secretary of Treasury or Commissioner of Customs
as an international airport for customs service.
b. A landing rights airport at which
specific permission to land must be obtained from customs
authorities in advance of contemplated use.
c. Airports designated under the
Convention on International Civil Aviation as an airport for use by
international commercial air transport and/or international general
aviation.
(See ICAO term INTERNATIONAL
AIRPORT.)
(Refer to
AIRPORT/FACILITY DIRECTORY.)
(Refer to
IFIM.)
INTERNATIONAL AIRPORT [ICAO]- Any airport designated by the
Contracting State in whose territory it is situated as an airport of
entry and departure for international air traffic, where the
formalities incident to customs, immigration, public health, animal
and plant quarantine and similar procedures are carried out.
INTERNATIONAL CIVIL AVIATION ORGANIZATION [ICAO]- A specialized
agency of the United Nations whose objective is to develop the
principles and techniques of international air navigation and to
foster planning and development of international civil air transport.
a. Regions include:
1. African-Indian Ocean Region
2. Caribbean Region
3. European Region
4. Middle East/Asia Region
5. North American Region
6. North Atlantic Region
7. Pacific Region
8. South American Region
INTERNATIONAL FLIGHT INFORMATION MANUAL- A publication designed
primarily as a pilot's preflight planning guide for flights into
foreign airspace and for flights returning to the U.S. from foreign
locations.
INTERROGATOR- The
ground-based surveillance radar beacon transmitter-receiver, which
normally scans in synchronism with a primary radar, transmitting
discrete radio signals which repetitiously request all transponders on
the mode being used to reply. The replies received are mixed with the
primary radar returns and displayed on the same plan position
indicator (radar scope). Also, applied to the airborne element of the
TACAN/DME system.
(See
TRANSPONDER.)
(Refer to AIM.)
INTERSECTING RUNWAYS-
Two or more runways which cross or meet within their lengths.
(See INTERSECTION.)
INTERSECTION-
a. A point defined by any combination of
courses, radials, or bearings of two or more navigational aids.
b. Used to describe the point where two
runways, a runway and a taxiway, or two taxiways cross or meet.
INTERSECTION
DEPARTURE- A departure from any runway intersection except the end
of the runway.
(See INTERSECTION.)
INTERSECTION TAKEOFF-
(See INTERSECTION DEPARTURE.)
IR-
(See IFR MILITARY
TRAINING ROUTES.)
|
AVIATION LIBRARY
