Pilot/Controller Glossary 

4/20/23 

IDAC

−

 

(See INTEGRATED DEPARTURE/ARRIVAL CAPABILITY.) 

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.) 

IDENTIFICATION [ICAO]

−

 The situation which exists when the position indication of a particular aircraft is 

seen on a situation display and positively identified. 
IF

−

 

(See INTERMEDIATE FIX.) 

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. 

PCG I

−

2