I do have the electrical design document if interested.
I have post it to
www.duvivier.com under Bavaria & Electricity directory
8 - speed and depth sounder
FYI I'm upgrading my entire electricity/electronic (including cables) on my Bavaria 370... It is great to have the document, it help a lot. Many devices were extremly old and no longer working properly and I had electric issues (not fixed by the previous owner).
I decide to redo everything (I'm electronic engineer)... the newer 410 panel includes far less switches/buttons and a 10 inch toutch screen connected to a raspberry pi (50 euros computer) with NMEA N2K interface (to the plug and play bus), from witch I pilot relays. I'm now developping few applictations ( like automaticaly switch off specific devices if running out of electric power or maintening the boat temperature at 3-4 degrée (celcius) during the winter)
I also added a sensors block in the engine room collecting engine and tanks parameter and signaling these to the N2K bus.
I upgraded the VHF with a AIS/VHF interfacing with N2K bus
And finally have wifi access to the N2K bus (and could monitor, switch devices from my smartphone, tablet, the newer 410 screen or even from home)
My next step is to interface with old seatalk equipements (in the cockpit) and inject sensors data to the N2K bus.
Bertrand