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Pilot/Controller Glossary

3/29/18

PCG L−2

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

aircraft at the same altitude by requiring operation on

different routes or in different geographical locations.

(See SEPARATION.)

LDA−

(See LOCALIZER TYPE DIRECTIONAL AID.)
(See LANDING DISTANCE AVAILABLE.)
(See ICAO Term LANDING DISTANCE

AVAILABLE.)

LF−

(See LOW FREQUENCY.)

LIGHTED AIRPORT− An airport where runway and

obstruction lighting is available.

(See AIRPORT LIGHTING.)
(Refer to AIM.)

LIGHT GUN− A handheld directional light signaling

device which emits a brilliant narrow beam of white,

green, or red light as selected by the tower controller.

The color and type of light transmitted can be used to

approve or disapprove anticipated pilot actions where

radio communication is not available. The light gun

is used for controlling traffic operating in the vicinity

of the airport and on the airport movement area.

(Refer to AIM.)

LIGHT-SPORT AIRCRAFT (LSA)− An

FAA-registered aircraft, other than a helicopter or

powered-lift, that meets certain weight and

performance. Principally it is a single−engine aircraft

with a maximum of two seats and weighing no more

than 1,430 pounds if intended for operation on water,

or 1,320 pounds if not. It must be of simple design

(fixed landing gear (except if intended for operations

on water or a glider), piston powered,

nonpressurized, with a fixed or ground adjustable

propeller). Performance is also limited to a maximum

airspeed in level flight of not more than 120 knots

calibrated airspeed (CAS), have a maximum

never-exceed speed of not more than 120 knots CAS

for a glider, and have a maximum stalling speed,

without the use of lift-enhancing devices of not more

than 45 knots CAS. It may be certificated as either

Experimental LSA or as a Special LSA aircraft. A

minimum of a sport pilot

 

certificate is required to

operate light-sport aircraft.

(Refer to 14 CFR Part 1, §1.1.)

LINE UP AND WAIT (LUAW)− Used by ATC to

inform a pilot to taxi onto the departure runway to line

up and wait. It is not authorization for takeoff. It is

used when takeoff clearance cannot immediately be

issued because of traffic or other reasons.

(See CLEARED FOR TAKEOFF.)

LOCAL AIRPORT ADVISORY (LAA)− A service

available only in Alaska and provided by facilities

that are located on the landing airport, have a discrete

ground−to−air communication frequency or the

tower frequency when the tower is closed, automated

weather reporting with voice broadcasting, and a

continuous ASOS/AWSS/AWOS data display, other

continuous direct reading instruments, or manual

observations available to the specialist.

(See AIRPORT ADVISORY AREA.)

LOCAL TRAFFIC− Aircraft operating in the traffic

pattern or within sight of the tower, or aircraft known

to be departing or arriving from flight in local practice

areas, or aircraft executing practice instrument

approaches at the airport.

(See TRAFFIC PATTERN.)

LOCALIZER− The component of an ILS which

provides course guidance to the runway.

(See INSTRUMENT LANDING SYSTEM.)
(See ICAO term LOCALIZER COURSE.)
(Refer to AIM.)

LOCALIZER COURSE [ICAO]− The locus of

points, in any given horizontal plane, at which the

DDM (difference in depth of modulation) is zero.
LOCALIZER OFFSET− An angular offset of the

localizer aligned within 3

_ of the runway alignment.

LOCALIZER TYPE DIRECTIONAL AID (LDA)−

A localizer with an angular offset that exceeds 3

_ of

the runway alignment, used for nonprecision

instrument approaches with utility and accuracy

comparable to a localizer, but which are not part of a

complete ILS.

(Refer to AIM.)

LOCALIZER TYPE DIRECTIONAL AID (LDA)

PRECISION RUNWAY MONITOR (PRM)

APPROACH− An approach, which includes a

glideslope, used in conjunction with an ILS PRM,

RNAV PRM  or GLS PRM approach to an adjacent

runway to conduct Simultaneous Offset Instrument