TM 1-1520-240-10
B-4
ABBREVIATION
TERM
OVHD or
OVRHD
Overhead
. . . . .
OVSP
Overspeed
. . . . . . .
PA
Pressure Altitude
. . . . . . . . . .
PAM
Pamphlet
. . . . . . . .
PARA
Paragraph
. . . . . . .
PDP
Power Distribution Panel
. . . . . . . .
PDU
Pilot Display Unit
. . . . . . . .
PGRM
Program
. . . . . .
PH
Phase
. . . . . . . . . .
PLT
Pilot
. . . . . . . . .
P/N
Part Number
. . . . . . . . .
PNL
Panel
. . . . . . . . .
POS
Position
. . . . . . . .
PP
Present Position
. . . . . . . . . .
PPH
Pounds per Hour
. . . . . . . .
PRESS
Pressure
. . . . . .
PRI
Primary
. . . . . . . . .
PROG
Program
. . . . . . .
PS
Power Supply
. . . . . . . . . .
PSCU
Power Supply Calibration Unit
. . . . . . .
PSF
Pounds per Square Foot
. . . . . . . . .
PSI
Pounds per Square Inch
. . . . . . . . .
PSIG
Pounds per Square Inch Gage
. . . . . . . .
PT
Pint
. . . . . . . . . .
PTIT
Power Turbine Inlet Temperature
. . . . . . . .
PTT
Push-to-Talk or Press-to-Talk
. . . . . . . . .
PTU
Power Transfer Unit
. . . . . . . .
PVT
Private
. . . . . . . . .
PWR
Power
. . . . . . . .
QT
Quart
. . . . . . . . . .
QTY
Quantity
. . . . . . . .
R
Red
. . . . . . . . . . .
R or RT
Right
. . . . .
RAD
Radar
. . . . . . . .
RAM
Random Access Memory
. . . . . . . .
RBL
Right Butt Line
. . . . . . . . .
RC
Rate of Climb
. . . . . . . . . .
RCU
Remoter Control Unit
. . . . . . . .
RCVR
Receiver
. . . . . . .
RD
Rate of Descent
. . . . . . . . . .
RECP or
REC
Receptacle
. . . . . . . .
RECT
Rectifier
. . . . . . .
REF
Reference
. . . . . . . .
REL
Release
. . . . . . . . .
REQD
Required
. . . . . . .
ABBREVIATION
TERM
RET or
RETR
Retract
. . . . . . .
Retrans or
RE-X
Retransmission
. . . . . . . .
REV CUR
Reverse Current
. . .
RF
Radio Frequency
. . . . . . . . . .
RH
Right-Hand
. . . . . . . . . .
RRPM
Rotor Revolutions per Minute
. . . . . . .
RPM
Revolutions per Minuter
. . . . . . . .
RV
Receive Variable
. . . . . . . . . .
RX
Receive or Receiver
. . . . . . . . . .
S
South
. . . . . . . . . . .
SDA
Synchro Discrete and Analog
. . . . . . . .
SDC
Signal Data Converter
. . . . . . . .
SDR
Symbol Generator and Driver
. . . . . . . .
SEC
Secondary
. . . . . . . .
SECT
Section
. . . . . . .
SEL
Select
. . . . . . . . .
SELDAR
Selective Address
. . . .
SENS
Sensitivity
. . . . . . .
SHP
Shaft Horsepower
. . . . . . . .
SL
Seal Level
. . . . . . . . . .
S/N
Serial Number
. . . . . . . . .
SLT
Searchlight
. . . . . . . . .
SP/DIR
Speed/Direction
. . . . . .
SPEC
Specification
. . . . . . .
SPH
Spheroid
. . . . . . . .
SQ
Squelch or Square
. . . . . . . . . .
SQ DIS/
TONE
Squelch Disable/Tone
. . . . . . .
SQ FT
Square Feet
. . . . . .
STA
Station
. . . . . . . . .
STBY
Standby
. . . . . . .
STO or
STR
Store
. . . . . . . .
SYS
System
. . . . . . . .
T/R + G
Transmit/Receive Plus Guard
. . . . .
Channel
TACH
Tachometer
. . . . . . .
TAS
True Airspeed
. . . . . . . . .
TCK
Track
. . . . . . . .
TGT
Target
. . . . . . . .
TEMP
Temperature
. . . . . . .
TOD
Time of Day
. . . . . . . .
TQ/ENG
Torque per Engine
. . . . .
TX
Transmit or Transmitter
. . . . . . . . . .
TYP
Typical
. . . . . . . . .
