[CA] E120 data feed, move from Seatalk 1 to Seatalk ng

[lotharjt]

Hi Chuck, sorry for the delay, I didn't see a 'page 2' on this thread. Attached is the system block diagram, simplified in some respects. If you need further clarifications, I can provide. A few comments:

- the NG and Seatalk 1 bus are now powered by a dedicated breaker and the S3G smartpilot is no longer enabled to power the ST1 bus

- if you check this thread, you'll see we discussed the version of s/w in the ST1-NG bridge. When I validated the version via the E120 master, it reported a version 2.3 and yet the latest report version on the Raymarine website is V2.03. Perhaps a reporting error by the E120 s/w??

- both plotters are V5.69

- prior to installing the NG bus, when it was simply an ST1 and NMEA 0183 config with the AIS feeding the slave plotter, the E120s could feed track data and report pilot status.

- I don't know the version of the itc-5, could that be relevant??

- I don't know the version of the DSM-300 s/w but I know it was updated as of the summer 2017 when I was working an intermittent ST-HS problem (which turned out to be a bad cable to the slave plotter)

Thanks in advance for the help.