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Abbreviations and Symbols 1


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AFM
airplane flight manual
AGL
above ground level
ALS
approach light system
APU
auxiliary power unit
ASR
airport surveillance radar
ATC
air traffic control
ATS
air traffic service
CAMP
continuous airworthiness maintenance program
CAS
calibrated airspeed
CAT II
category II
CHDO
an FAA Flight Standards certificate holding district office
CMP
configuration, maintenance, and procedures
CONSOL or CONSOLAN
a kind of low or medium frequency long range navigational aid
DH
decision height
DME
distance measuring equipment compatible with TACAN
EAS
equivalent airspeed
EFVS
enhanced flight vision system
Equi-Time Point
a point on the route of flight where the flight time, considering wind, to each of two selected airports is equal
ETOPS
extended operations
EWIS
electrical wiring interconnection system
FAA
Federal Aviation Administration
FFS
full flight simulator
FM
fan marker
FSTD
flight simulation training device
FTD
flight training device
GS
glide slope
HIRL
high-intensity runway light system
IAS
indicated airspeed
ICAO
International Civil Aviation Organization
IFR
instrument flight rules
IFSD
in-flight shutdown
ILS
instrument landing system
IM
ILS inner marker
INT
intersection
LDA
localizer-type directional aid
LFR
low-frequency radio range
LMM
compass locator at middle marker
LOC
ILS localizer
LOM
compass locator at outer marker
M
mach number
MAA
maximum authorized IFR altitude
MALS
medium intensity approach light system
MALSR
medium intensity approach light system with runway alignment indicator lights
MCA
minimum crossing altitude
MDA
minimum descent altitude
MEA
minimum en route IFR altitude
MEL
minimum equipment list
MM
ILS middle marker
MOCA
minimum obstruction clearance altitude
MRA
minimum reception altitude
MSL
mean sea level
NDB (ADF)
nondirectional beacon (automatic direction finder)
NM
nautical mile
NOPAC
North Pacific area of operation
NOPT
no procedure turn required
OEI
one engine inoperative
OM
ILS outer marker
OPSPECS
operations specifications
PACOTS
pacific organized track system
PAR
precision approach radar
PMA
parts manufacturer approval
PTRS
performance tracking and reporting system
RAIL
runway alignment indicator light system
RBN
radio beacon
RCLM
runway centerline marking
RCLS
runway centerline light system
REIL
runway end identification lights
RFFS
rescue and firefighting services
RNAV
area navigation
RR
low or medium frequency radio range station
RVR
runway visual range as measured in the touchdown zone area
SALS
short approach light system
SATCOM
satellite communications
SSALS
simplified short approach light system
SSALSR
simplified short approach light system with runway alignment indicator lights
TACAN
ultra-high frequency tactical air navigational aid
TAS
true airspeed
TCAS
a traffic alert and collision avoidance system
TDZL
touchdown zone lights
TSO
technical standard order
TVOR
very high frequency terminal omnirange station
V 1
the speed beyond which the takeoff can no longer be safely aborted
V 2
takeoff safety speed
V 2min
minimum takeoff safety speed
V A
design maneuvering speed
V B
design speed for maximum gust intensity
V C
design cruising speed
V DF
demonstrated flight diving speed
V D
design diving speed
V EF
the speed at which the critical engine is assumed to fail during takeoff
V FC
maximum speed for stability characteristics
V FE
maximum flap extended speed
V F
design flap speed
V FTO
final takeoff speed
V H
maximum speed in level flight with maximum continuous power
V LE
maximum landing gear extended speed
V LOF
lift-off speed
V LO
maximum landing gear operating speed
V MC
minimum control speed with the critical engine inoperative
V MO
maximum operating limit speed