6/17/21 

Pilot/Controller Glossary 

L 

LAA

−

 

(See LOCAL AIRPORT ADVISORY.) 

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 OPERATIONS

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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. 

(See PARALLEL RUNWAYS.) 
(Refer to AIM.) 

LAND

−

BASED AIR DEFENSE IDENTIFICA-

TION ZONE (ADIZ)

−

 An ADIZ over U.S. 

metropolitan areas, which is activated and deactivat-
ed as needed, with dimensions, activation dates, and 
other relevant information disseminated via NO-
TAM. 

(See AIR DEFENSE IDENTIFICATION ZONE.) 

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 (LDA)

−

 The 

runway length declared available and suitable for a 
landing airplane. 

(See ICAO term LANDING DISTANCE 

AVAILABLE.) 

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 MDA or DH must meet the 

conditions stated in 14 CFR Section 91.175. 

(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. 

PCG L

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