[CA] [CA11] Revising system network

[MaMakani2019]

Hi Chuck,

Attached is a revised diagram 3-23-19 which, I hope, has followed your recommendations correctly. Questions:
1) Is NMEA 0183 a balanced signal and therefore the negative wire should be floating and not connected to ground or the shield? I don't want to create ground loops. Also, I expect the shield should only be connected to ground at the source end. For example, the 125 GPS GRN and BWN should or should not be connected to the shield which goes to DC ground only at the GPS end. Same with the NMEA to the 300 Course Computer--ground the shield only at the C95.
2) Should I turn off the C95 internal GPS receiver since I'm using the 125 GPS or will the MFD figure this out?
3) I have 5 C/Bs feeding the system: VHF/AIS, Instruments (powers 125 GPS, SEATALKng and SEATALK #2), Autopilot (also powers SEATALK #1), Chartplotter and Radar. I think this is what you recommended.
4) Your item 7 above refers to an ST40 Wind but I have an i40 Wind. Any problem using this as a repeater on SEATALK #2 since it has a regular SEATALK connector?

Your help is really appreciated. Thanks so much and fair winds to you!
Cheers,
Mark