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PI
Parallel Index line
Past positions
Equally time-spaced past position marks of a tracked or AIS target and own ship.
POSN
Position
PRF
Pulse Repetition Frequency
The number of radar pulses transmitted each second.
PROC
Process
Radar signal processing function
Radar beacon
A navigation aid which responds to the radar transmission by generating a radar signal
to identify its position and identity
Radar cross-section Radar cross-section of a target determines the power density returned to the radar for a
particular power density incident on the target
Range Rings
A set of concentric circles labeled by distance from CCRP.
Reference target
A symbol indicating that the associated tracked stationary target is used as a speed
reference for the ground stabilization
Relative course
The direction of motion of a target relative to own ship motion
Relative speed
The speed of a target relative to own ship's speed data
Relative vector
A predicted movement of a target relative to own ship's motion
RM
Relative Motion
A display on which the position of own ship remains fixed, and all targets move relative
to own ship.
RM(R)
Relative Motion. Relative Trails.
RM(T)
Relative Motion. True Trails.
ROT
Rate Of Turn
Change of heading per time unit.
Route
A set of waypoints.
RR
Range Rings
P
R
GLOSSARY
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