3-11 
CAUTION 
 
3.2.6   Suppress Rain/Snow Clutter [RAIN] 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
※ Also see to the section “3.2.8    Adjust to the Best Image” 
 
 
Using the manual rain / snow clutter suppression mode 
 
 
 Procedures   1  Adjust the rain / snow clutter returns of the display by turning the 
[AUTO-RAIN] dial until targets can be easily observed. 
 
Turning [RAIN] dial clockwise suppresses rain / snow clutter returns. 
Turning [RAIN] dial counterclockwise intensifies rain / snow clutter returns. 
 
When the [RAIN] dial is turned clockwise, the rain / snow clutter suppression function 
suppresses rain / snow clutter returns and gets targets hidden by rain / snow clutter returns to 
appear of the display. However, be careful that excessive suppression may cause small targets 
to be overlooked. Since the rain / snow clutter suppression function also has the effect of 
suppressing sea clutter, the suppression efficiency improves when the [RAIN] dial is used with 
the [SEA] dial. In general, turn the [RAIN] dial fully to the left. 
 
 
 
 
 
 
 
 
 
 
 
When using the [AUTO RAIN] function, never set the 
suppression level too high canceling out all image noises from 
the rain or snow at the close range. 
Detection of not only echoes from the rain or snow but also 
targets such as other ships or dangerous objects will become 
inhibited. 
When using the [AUTO RAIN] function, make sure to choose the 
most appropriate image noise suppression level. 
When the optimum setting level is lost, recommend to   
readjust the initial setting level once. 
The initial setting level is indicated on the bar-graph 
with light blue on lower left of the display. 
 
The initial setting level is changed by the each function 
mode. See to section “3.9 USE FUNCTION KEY [USER]” 
for details of the function modes 
 
Present level
Initial setting level