TM 1-1520-240-10
B-3
ABBREVIATION
TERM
ID or
IDENT
Identification
. . . . . .
IFF
Identify Friend or Foe
. . . . . . . . .
IFR
Instrument Flight Regulations
. . . . . . . . .
IGE
In Ground Effect
. . . . . . . . .
IGN
Ignition
. . . . . . . . .
ILCA
Integrated Lower Control Actuator
. . . . . . . .
ILS
Instrument Landing System
. . . . . . . . .
IMC
Instrument Meteorological Condi
. . . . . . . . .
tions
IN. or “
Increase
. . . . . .
INC
Increase
. . . . . . . . .
IND
Indicator
. . . . . . . . .
INOP
Inoperative
. . . . . . . .
INST
Instruments
. . . . . . . .
INT or
INPH
Interphone
. . . . . . . .
INTR
Interior
. . . . . . . .
ITO
Instrument Takeoff
. . . . . . . . .
JP-4, JP-5
or JP-8
Jet Petroleum
. . . . . .
K
Key
. . . . . . . . . . .
KYBD
Keyboard
. . . . . . .
kHz
Kilohertz
. . . . . . . . .
KIAS
Knots Indicated Airspeed
. . . . . . . .
Km
Kilometer
. . . . . . . . .
KN or KTS
Knots
. . .
L
Left
. . . . . . . . . . .
LAT/LONG
Latitude/Longitude
. . .
LB
Pounds(s)
. . . . . . . . . .
LB-FT
Pound-Feet (Torque)
. . . . . . .
LB/GAL
Pounds per Gallon
. . . . .
LB/HR
Pounds per Hour
. . . . . . .
LBL
Left Butt Line
. . . . . . . . .
LCT
Longitudinal Cyclic Trim
. . . . . . . . .
LD
Load
. . . . . . . . . .
DL-V
Load Variable
. . . . . . . .
LF
Low Frequency
. . . . . . . . . .
LG
Length
. . . . . . . . . .
LH
Left-Hand
. . . . . . . . . .
LO
Low
. . . . . . . . . .
LOC
Location
. . . . . . . .
LSB
Lower Sideband
. . . . . . . . .
LTG
Lighting
. . . . . . . . .
LTS
Lights
. . . . . . . . .
LVL
Level
. . . . . . . . .
M
Mode or Middle
. . . . . . . . . . .
ABBREVIATION
TERM
MA
Missile Alert
. . . . . . . . .
MAG
Magnetic
. . . . . . . .
MAL
Malfunction
. . . . . . . .
MAM
Manual
. . . . . . . .
MAX
Maximum
. . . . . . . .
MB or
MKR BCN
Marker Beacon
. . .
M-C
Mode C
. . . . . . . . .
MCW
Modulated Carrier Wave
. . . . . . .
MDL
Module
. . . . . . . .
MED
Medium
. . . . . . . .
MEM
Memory
. . . . . . . .
MEM
LOAD
Memory Load
. . . . . . .
MHz
Megahertz
. . . . . . . .
MID
Middle
. . . . . . . . .
MIL
Angular Measurement, Military
. . . . . . . . .
MIN
Minute(s) or Minimum
. . . . . . . . .
MK
Manual keying
. . . . . . . . .
MM
Millimeter
. . . . . . . . .
MOM
Momentary or Moment
. . . . . . .
MOM. ON
Momentary On
. . .
MSG
Message
. . . . . . . .
MSL
Mean Sea Level or Missile
. . . . . . . .
MST
Master Caution
. . . . . . . .
MTR
Motor
. . . . . . . .
MWOD
Multiple Word of Day
. . . . . .
N
North
. . . . . . . . . . .
NAC
Nacelle
. . . . . . . .
NAV
Navigation
. . . . . . . .
NB
Narrow Band
. . . . . . . . . .
NM
Nautical Mile
. . . . . . . . .
NO
Number
. . . . . . . . .
NORM
Normal
. . . . . .
NPU
Navigation Processor Unit
. . . . . . . .
NVG
Night Vision Goggles
. . . . . . . .
N1
Gas Producer (Speed)
. . . . . . . . . .
N2
Power Turbine (Speed)
. . . . . . . . . .
O
Outer
. . . . . . . . . . .
OBS
Obstacle
. . . . . . . .
OFST
Offset
. . . . . . .
OGE
Out-of-Ground Effect
. . . . . . . .
ONS
Omega Navigation System
. . . . . . . .
OP
Operation
. . . . . . . . . .
OU
Optical Unit
. . . . . . . . .
OUTB’D
Outboard
. . . . .
