JRC JMR-9230-S Installation Manual page 22

During sailing, be sure to check the own ship's position and bearing as often
as necessary, regardless of whether the automatic sailing is in operation or
not.
Otherwise, accidents may result.
Do not turn off the power during Backup/Restore.
Otherwise, a malfunction may occur.
Do not do the backup operation of data while sailing.
The radar application should be ended to begin the data backup. It becomes
impossible to observe using radar and this may lead to accidents.
In the case of turning on the power under the condition of low temperature, do
pre-heat less than 30 minutes.
Otherwise, the equipment may not start normally.
The judgement of formal or informal about chart depends on the
administration organization of the flag state. About the officially of the chart,
please contact the administration organization.
Please do not touch the LAN connector. May have to fail due to static
electricity. When attaching and detaching the LAN connection equipment,
please remove static electricity by touching the metal.
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