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.
INTERNATIONAL FLIGHT INFORMATION MANUAL/IFIM - A Federal Aviation Administration publication designed primarily as a pilot's preflight planning guide for flight into foreign airspace and for flights returning to the United States 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)
INTERSECTING RUNWAYS - Two or more runways which cross or meet within their length. (See Intersection) INTERSECTION -
(1)
A point defined by a combination of courses, radials or bearings of two or more navigational aids.
(2)
Used to describe the point where two runways, a runway and a taxiway, or two taxiways cross or meet.
INTERSECTION DEPARTURE/INTERSECTION TAKEOFF - A take-off or proposed take-off on a runway from an intersection. (See Intersection)
I SAY AGAIN - The message will be repeated.
JAMMING - Electronic or mechanical interference which may disrupt the display of aircraft on radar or the transmission/reception of radio communications/navigation.
JET BLAST - Jet engine exhaust (thrust stream turbulence). (See Wake Turbulence)
JET ROUTE - A route designed to serve aircraft Operations from 18,000 feet mean sea level up to and include Flight Level 450. The routes are referred to as "J" routes with numbering to identify the designated route; e.g., J105. (See Route) (Refer to Federal Air Regulations Part 71)
JET STREAM (P/CG) - A migrating stream of high-speed winds present at high altitudes.
JET STREAM (JCS, NATO) - A narrow band of high velocity wind in the upper troposphere or in the stratosphere.
JETTISONING OF EXTERNAL STORES - Airborne release of external stores; e.g., tiptanks, ordinances. (See Fuel Dumping) (Refer to Federal Air Regulations Part 91)
JETTISON (JCS) - Deliberate release of an aircraft store from an aircraft to effect aircraft safety or prepare for air combat.
JOINT USE RESTRICTED AREA - (See Restricted Area)
KNOWN TRAFFIC - With respect to Air Traffic Control clearances, means aircraft whose altitude, position and intentions are known to Air Traffic Control.
LAHSO (P/CG) - An acronym for "Land and Hold Short Operation." These operations include landing and holding short of an intersecting runway, a taxiway, a predetermined point, or an approach/departure flight path.
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