background image

6/17/21 

Pilot/Controller Glossary 

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 instru-

ment 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 interna-

tional 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 interna-
tional general aviation. 

(See ICAO term INTERNATIONAL AIRPORT.) 
(Refer to Chart Supplement U.S.) 

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 ORGA-
NIZATION [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. 

INTERNATIONAL NOTICE

 A notice containing 

flight prohibitions, potential hostile situations, or 
other international/foreign oceanic airspace matters. 

PCG I