2/14/08 Pilot/Controller Glossary
PCG J-1
J
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 MSL up to and including
flight level 450. The routes are referred to as “J”
routes with numbering to identify the designated
route; e.g., J105.
(See Class A AIRSPACE.)
(Refer to 14 CFR Part 71.)
JET STREAM- A migrating stream of high‐speed
winds present at high altitudes.
JETTISONING OF EXTERNAL STORES- Airborne
release of external stores; e.g., tiptanks,
ordnance.
(See FUEL DUMPING.)
(Refer to 14 CFR Part 91.)
JOINT USE RESTRICTED AREA-
(See RESTRICTED AREA.)

2/14/08 Pilot/Controller Glossary
PCG K-1
K
KNOWN TRAFFIC- With respect to ATC clearances,
means aircraft whose altitude, position, and
intentions are known to ATC.

2/14/08 Pilot/Controller Glossary
PCG L-1
L
LAA-
(See LOCAL AIRPORT ADVISORY.)
LAAS-
(See LOW ALTITUDE ALERT SYSTEM.)
LAHSO- 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
flightpath.
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 OPERATIONSOperations
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.
(See PARALLEL RUNWAYS.)
(Refer to AIM.)
LANDING AREA- Any locality either on land,
water, or structures, including airports/heliports and
intermediate landing fields, which is used, or
intended to be used, for the landing and takeoff of
aircraft whether or not facilities are provided for the
shelter, servicing, or for receiving or discharging
passengers or cargo.
(See ICAO term LANDING AREA.)
LANDING AREA [ICAO]- That part of a movement
area intended for the landing or take‐off of aircraft.
LANDING DIRECTION INDICATOR- A device
which visually indicates the direction in which
landings and takeoffs should be made.
(See TETRAHEDRON.)
(Refer to AIM.)
LANDING DISTANCE AVAILABLE [ICAO]- The
length of runway which is declared available and
suitable for the ground run of an aeroplane landing.
LANDING MINIMUMS- The minimum visibility
prescribed for landing a civil aircraft while using an
instrument approach procedure. The minimum
applies with other limitations set forth in 14 CFR
Part 91 with respect to the Minimum Descent
Altitude (MDA) or Decision Height (DH) prescribed
in the instrument approach procedures as follows:
a. Straight‐in landing minimums. A statement of
MDA and visibility, or DH and visibility, required for
a straight‐in landing on a specified runway, or
b. Circling minimums. A statement of MDA and
visibility required for the circle‐to‐land maneuver.
Note:Descent below the established MDA or DH is
not authorized during an approach unless the
aircraft is in a position from which a normal
approach to the runway of intended landing can be
made and adequate visual reference to required
visual cues is maintained.
(See CIRCLE‐TO‐LAND MANEUVER.)
(See DECISION HEIGHT.)
(See INSTRUMENT APPROACH
PROCEDURE.)
(See MINIMUM DESCENT ALTITUDE.)
(See STRAIGHT‐IN LANDING.)
(See VISIBILITY.)
(Refer to 14 CFR Part 91.)
LANDING ROLL- The distance from the point of
touchdown to the point where the aircraft can be
brought to a stop or exit the runway.
LANDING SEQUENCE- The order in which
aircraft are positioned for landing.
(See APPROACH SEQUENCE.)
LAST ASSIGNED ALTITUDE- The last altitude/
flight level assigned by ATC and acknowledged by
the pilot.
(See MAINTAIN.)
(Refer to 14 CFR Part 91.)
LATERAL NAVIGATION (LNAV)– A function of
area navigation (RNAV) equipment which calculates,
displays, and provides lateral guidance to a profile or
path.
LATERAL SEPARATION- The lateral spacing of
　
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