JRC JMA-9123-7XA Instruction Manual page 13

Use Target Tracking (TT) function only as a navigation
!
aid. The final navigation decision must always be made
by the operator him/herself. Making the final navigation
decision based only on tracking target information may
cause accidents.
Tracking target information such as vector, target
numerical data, and alarms may contain some errors.
Also, targets that are not detected by the radar cannot be
acquired or tracked.
Making the final navigation decision based only on the
radar display may cause accidents such as collisions or
running aground.
A malfunction may occur if the power in the ship is
!
instantaneously interrupted during operation of the radar.
In this case, the power should be turned on again.
When using the [AUTO SEA] function, never set the
suppression level too high canceling out all image noises
from the sea surface at close range.
Detection of not only echoes from waves but also targets
such as other ships or dangerous objects will become
inhibited.
When using the [AUTO SEA] function, make sure to
choose the most appropriate image noise suppression
level.
When using the [AUTO RAIN] function, never set the
suppression level too high canceling out all image noises
from the rain or snow at 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.
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