RFSTC— RF sensitivity time control.
RHI— Range-height indicator.
RING-AROUND— The appearance of a target close to
the origin of the display screen that extends nearly
360 degrees. Usually a result of close-in targets
responding to side lobe IFF interrogations.
ROF— Radar operational facilities.
RPM— Rotation per minute.
RSC— Radar set control.
RTS— Radar test set.
RVC— Radar video converter.
RVP— Radar video processor.
SBBM— System/bootstrap bus monitor.
SDC— Signal data converter.
SDMS— Shipboard data multiplex system.
SEM— Standard electronic modules.
SHM— Ships heading marker.
SIF MODES— Selective identification feature modes
of IFF (modes 1, 2, and 3/A) used by friendly
aircraft and surface craft.
SM&R CODE— Source,
recoverability code.
SMS— Ships motion sensor.
maintenance, and
SPETE—
Special-purpose
electronic
test
equipment.
SPW— Special warfare.
SR— Sector radiate.
SRF— Ship repair facility.
SRM— Short range mode.
SSTX— Solid-state transmitter.
STALO— Stable local oscillator.
STC— Sensitivity time control.
STEEP— Support and Test Equipment Engineering
Program.
SVC— Sensitivity velocity control.
TACC— Tactical Air Control Center on LHA and LHD
type ships.
TAO— Tactical action officer.
TCAS— Traffic Alert and Collision Avoidance
System.
TEMPERATURE INVERSION— An atmospheric
condition in which the normal properties of the
layers of the air are reversed.
TRS— Technical repair standards.
VCS— Video clutter suppression.
VSWR— Vohage standing wave ratio.
AI-3
