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BASIC OPERATION
■ RAIN function
This function eliminates echoes from rain, snow, fog,
and so on.
➥ Rotate the [RAIN]/[ ] control fully counter-
clockwise to deactivate the control function.
• The RAIN icon ( ) disappears.
NOTE: DO NOT reduce the echoes too much, oth-
erwise you may miss weaker targets.
■ SEA function
This function serves to eliminate echoes from waves at
close range. Reduce the receiver gain for close objects
within a radius of approximately 8 NM to eliminate sea
clutter.
➥ Rotate the
[SEA]/[ ]
control fully clockwise
to activate the automatic control function.
• The SEA icon ( ) is displayed in the upper left corner
of the screen.
• “AUTO” is displayed below the SEA icon (
) when the
automatic control function is active.
R WARNING! The [SEA]/[ ] control re-
duces the receiver sensitivity of objects within ap-
proximately 8 NM. Therefore, caution and careful
adjustment are necessary when using the [SEA]/[
] control.
Small objects may not be displayed on the screen
when strong echoes from rain or islands within 1 NM
while the automatic SEA function is activated.
The following are typical basic operation examples that may hinder radar reception (sea clutter, precipitation in-
terference and echoes from other radar).
Adjust SEA control
Echoes from sea waves
Adjust RAIN controlSmall echoes
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