JRC JMA-2353 Instruction Manual page 12

PRECAUTIONS
Since these alarms may include some errors depending on the
target tracking conditions, the navigation officer himself should
make the final decision for ship operations such as collision
avoidance.
Making the final navigation decision based only on the alarm may
cause accidents such as collisions.
When setting an automatic acquisition zone, make sure to properly
adjust gain, sea-surface reflection suppression level, and
rain/snow reflection suppression level so that the optimal target
images are always on the radar screen. The automatic acquisition
zone alarm will not be activated for targets undetected by the
radar, and it may result in accidents such as collisions.
Any adjustments must be made by specialized service personnel.
Incorrect settings may cause unstable operation and result in
accidents or equipment failure.
Do not make any adjustments during navigation. Failure to comply
may result in adverse effects on the radar function which may lead
to accidents or equipment failure.
Make sure to shut off the main power before replacing parts.
Failure to comply may result in electrocution or equipment failure.
When replacing magnetrons, make sure to shut off the main power
and let the equipment stand for more than 5 minutes to discharge
the high-voltage circuit.
Failure to comply may result in electrocution.
Make sure to take off your watch when your hand must get close
to the magnetron.
Failure to comply may result in damage to the watch since the
magnetron is a strong magnet.
A part of CRT monitor (CCN-366) generates the high voltage of
approx. 10 kV. For non-service personnel, never touch the inside
of the display unit.
Failure to comply may result in electrocution.
When cleaning the display screen, do not wipe it too strongly with
a dry cloth. Also, do not use gasoline or thinner to clean the
screen.
Failure to comply will result in damage to the screen surface.
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CAUTION