TM 1-1520-238-10
Change 9
B-15
Appendix B – Abbreviations and Terms (cont)
RNG
Range
RPM, rpm
Revolutions per Minute
RTR
Rotor
RTR BK
Rotor Brake
RTR BL
Rotor Blade
RTSS
Radio Transmitter Select System
RWND
Rewind
S
SAS
Stability Augmentation Subsystem
SCAS
Stability and Command Augmentation System
SCL
Scale
SDC
Shaft Driven Compressor
SDCC
Signal Data Converter Computer (DNS Computer)
SDD
Selectable Digital Display
SEC
Secondary
SEL
Select
SEU
Sight Electronics Unit
SG
Symbol Generator
SHP
Shaft Horsepower
SKR
Seeker
SL
Sea Level
SN
Serial Number
SPAD(S)
Shear-pin-actuated Decoupler (system)
SPH
Spheroid
SQ
Super Quick
SQ FT, sq ft
Square Foot, Square Feet
