Just top clearify the CLOCK-H and CLOCK-C on the Furuno Radar:

This radar is set up primarily for a Gyro Input via their AD-100 A/D
converter which produces a proprietory format AD10S input signal to the Gyro
connector (heading sensor). However the way I read the manual this connector
can alternately except NMEA 0183 input.

Here is the way the manual discribes this sensor connection:

"The heading sensor (FLUX-50, C-2000/3000) having AD10S format or NMEA 0183
output data format can be connected instead of a gyrocompass. In this case,
you should select the 'MAG' instead of 'GYRO' on the INSTALLATION menu."
"When heading data of NMEA 0183 format is used, connect the signal to 'GYRO'
connector J353 #1(DATA-H) and data #2 (DATA-C). The acceptable data
(talker/sentence are ** HDM, **HDG and **HDT."

I'm now begining to understand that all NMEA outputs are "not equal".. As I
look at the schematic diagram of the output port on my Furuno GP32 GPS, I
see the talker port connector has outputs labeled RD, SD, Signal GRD which
are used for the serial input to the computer. Then there is additional
output designated as DATA-H and DATA-C (same as Signal GRD) these go to the
none serial devices.

I think I know or had heard all of this in the past but it just never soaked
in. I'll keep it in mind in my Future hook up attempts.

Regarding trying to read the Flux data on the DATA input port on the radar,
I think I have tried that, but just to make sure, I will give it a try
today.. The connectors are identical however they pins utilized are
different.. I can make that change over on my 'hardwire' hub.

Thanks again for all the comments, emails and recommendations..

Steve
s/v Good Intentions