I'm planning on rewriting my yacht as well. Although it is only 27ft there is a birds nest of wires behind the switch panel. I have Nigel calders book, sailboat electrics simplified and boat owners illustrated electrical
handbook. After reading them I have got my head
around it. I'm Starting with the house and starter battery
set up first and then will go system to system. Also draw out a plan so you can cover all the systems. I done that with the with the battery
and switching and made it a lot easer to see then trying to follow wires as your doing it.
But in short having a read of some boat electrics books
and take your time.
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