[TG] [TG11] Fluxgate compass / course computer troubleshooting

[tmass60]

Hi Tom - sorry to follow-up again but want to be sure I get the RF Ground connection correct with a new ACU-200.

I don't have a dedicated RF ground like a Dynaplate on the boat. There is what I believe is a copper bonding system (see far right in the attached pic) but that seems to be more lightning protection related (this is a sailboat and the copper wiring shown is ultimately connected to a keel bolt). I don't think the thru-hulls are connected to it (will have to check next weekend) and I am nearly certain there are no electronics connected. Seems IMHO best to leave this alone and not potentially introduce any stray currents so ...

What is "-ve" power? I am not familiar with this term.

Assuming this is essentially another term for my 12V DC system, does the drain conductor (screen) need to be a completely separate wire from the ground terminal on the ACU to the negative post of the battery system or can it "pig-tail" from the same negative wire I am using to supply the 12V power to the ACU-200 (#3 on the connections overview in the ACU-200 install manual, page 22)?

Thanks,

Tony