(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.
LAHSO-DRY - Land and hold short operations on runways that are dry.
LAHSO-WET - Land and hold short operations on runways that are wet (but not contaminated).
LAND AND HOLD SHORT OPERATIONS - Operations which include simultaneous takeoffs and landings and/or simultaneous landings when a landing aircraft is able and is instructed by the controller to hold-short of the intersecting runway/taxiway or designated hold-short point. Pilots are expected to promptly inform the controller if the hold short clearance cannot be accepted.
LANDING AREA (JCS, NATO) -
(1) That part of the objective area within which are conducted the landing Operations of an amphibious force. It includes the beach, the approaches to the beach, the transport areas, the fire support areas, the air occupied by close supporting aircraft, and the land included in the advance inland to the initial objective.
(2)
AIRBORNE - The general area used for landing troops and material either by airdrop or air landing. This area includes one or more drop zones or landing strips.
(3)
Any specially prepared or selected surface of land, water, or deck designated or used for take-off and landing of aircraft.
LANDING AREA (ICAO) - The part of the movement area intended for the landing or take-off run of aircraft.
LANDING DIRECTION INDICATOR (P/CG) - A device which visually indicates the direction in which landing and take-off should be made. (See Tetrahedron)
LANDING DISTANCE AVAILABLE [ICAO] - The length of runway which is declared available and suitable for the ground run of an aeroplane landing.
LANDING FORECAST (TREND TYPE) (ICAO) - A concise statement, appended to a routine or selected special report, indicating what significant change (expressed as a trend) from the conditions described in the report are likely to occur during the validity period of the forecast. One of the change indicators listed below will be used to identify the beginning of the trend forecast, and will be inserted into the message immediately after the report, except when the term "NOSIG" is used.
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