User's Manual
GLOSSARY
xxvi
S
SART
Search And Rescue Transponder
Radar transponder capable of operating in the 9GHz band
Sea stabilization
A display mode in which speed and course information are referred to the sea.
Sea state
Status of the sea condition due to the weather environment, expressed as a sea state 0 for
flat conditions with minimal wind, to sea state 8 for very rough sea conditions.
SET
The current direction for manual correction or the current speed on the horizontal axis of
the 2-axis log is displayed.
Sleeping AIS target
A target indicating the presence and orientation of a vessel equipped with AIS in a
certain location.
SOG
Speed Over the Ground
The speed of the ship relative to the earth, measured on board of the ship.
SP
Short Pulse
STAB
Stabilization
STW
Speed Through Water
The speed of the ship relative to the water surface.
T
TCPA
Time to Closest Point of Approach to own ship
Test target
Radar target of known characteristics used for test requirement
TM
True Motion
A display across which own ship moves with its own true motion.
Trails
Display Radar Trails (Other Ships' Trails)
True course
The direction of motion relative to ground or to sea, of a target expressed as an angular
displacement from north
True speed
The speed of a target relative to ground, or to sea
True vector
A vector representing the predicted true motion of a target, showing course and speed
with reference to the ground or sea
TT
Target Tracking.
A computer process of observing the sequential changes in the position of a radar target
in order to establish its motion. Such a target is a Tracked Target.
TTG
Time To Go.
Time to next waypoint.
TXRX
Transceiver Unit