The bow thruster is powered by the Aux battery.
The batteries must be disconnected from the electronic circuit before changing a fuse. For more information, see the manufacturer’s manual.
Incorrect use may cause overheating and short circuiting, and pose a fire risk.
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                    Use the bow thruster for only short periods at a time. 
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                    Do not exceed four duty cycles (max. 30 seconds long in 25 mins). 
If overloading occurs, contact a qualified marine electrician.
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                    Do not touch the bow thruster or its fuse if the Aux main switch is switched on. 
Pinching hazard
Never put your hand or any other body part near a windlass or bow roller in operation.