Furuno CH-250 Operator's Manual page 8

Usage Precautions
The Motion Sensor MS-100 compensates for ship's pitching and rolling. However, it does not
compensate for load unbalance.
If the equipment will not be used for a long time shut off the power to it at the mains
switchboard to prevent battery discharge.
If the soundome is to be operated while the ship is dry-docked set the transmitter output power
to "minimum" on the COMN menu. Damage to the train-tilt section may result if it is operated
with maximum transmitter power.
When the ship is dry-docked check for signs of corrosion on the soundome. Find the reason
for the corrosion and attach a zinc plate to the hull unit as an anticorrosion measure if
necessary.
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