Thanks for the input! I had no idea that a depth transfer spoke NMEA 0183 - I thought that was only AIS. I did purchase an NMEA 0183 multiplexer, but I’m having a really hard time purchasing a thru-hull depth transducer. I just can’t punch a hole through a perfectly good hull. I did find a in-hull transducer, so I’ll probably go that route. 

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> On Oct 17, 2020, at 8:29 PM, Peter Nyberg <peter at sunnybeeches.com> wrote:
> 
> ?FWIW, my approach on this was to use a NMEA 0183 multiplexer.
> 
> My VHF radio also has GPS and AIS.  I have a thru-hull transducer that has depth, speed, and temperature.  Both of these speak NMEA 0183. They are connected by wire to a multiplexer that my iPad will connect to via WIFI.  My chart plotter app (SEAiq) supports integrating all of this data into its display over the WIFI connection.  (I know INavX also supports this.).  
> 
> Peter Nyberg
> Coventry, CT 
> s/v Silverheels (1988/2016)
>