JRC JMA-5212-4/6 User Manual page 331

With the SART display mode set to ON, settings as shown below are made automatically.
(1) Sea clutter control:
(2) AUTO SEA function:
(3) Rain and Snow Clutter Control (RAIN):
(4) Auto Rain and Snow Clutter function (AUTO RAIN):
(5) TUNE control:
(6) Interference rejector (IR):
(7) PROCESS:
Land
Attention
z When the SART function is set to ON, small targets around own ship will
disappear from the radar display. So it is necessary to exercise full
surveillance over the conditions around own ship by visual watch in
order to avoid any collision or stranding.
If two or more sets of radar equipment are installed on own ship, use
one set of 9 GHz band radar for detection of the SART signal and
operate others as normal radars for avoiding collision, monitoring
targets around own ship, and checking on own ship's position and
avoidance of stranding.
After end of detecting the START signal, turn the START display off.
Then the radar returns normally to the nautical mode.
6.5 DISPLAY OF RADAR TRANSPONDER
Minimum (Most counterclockwise)
OFF
minimum
OFF
No tuning (to weaken clutter echoes)
OFF
OFF
SART code
Position of SART
Other ships
[Example of Display]
6 14
Position of the rescue craft
yyy
yyy
6