i70 - Sea Temp with Merc Gateway

[psubill78]

Setup: A12, CPT-120 transducer, Merc Gateway (2 engines). Multiple i70 displays.

When the merc gateway is powered up - I lose the sea temp on the i70 units. Shows the incorrect data from the merc gateway (as there is no transducer supplying the data).

When I turn off the engines, the i70 shows the sea temp from the CPT-120.

On the a12, there is a data called Environment/Water Temp that shows the transducer data the whole time, regardless of if the engines are on or not.

The i70 doesn't have a water temp, nor an ability to select the water/sea temp source.

I suspect this is a NMEA duplicate data issue. I can't find any setting to resolve - but hoping there is one :)

Thank you