Peter,
My R22 is a ‘97 with solid core (as I believe all others are).  I’ve had an Airmar in hull transducer to a Garmin for 26+ years with good results. I mounted it next to the compression post in the head with an inspection port for access.

Jay Friedland
S/V Wanderlust ‘97

Sent from my iPhone

> On Jan 6, 2025, at 1:39 PM, peter beckerman via Rhodes22-list <rhodes22-list at rhodes22.org> wrote:
> 
> Hi All,
>   I recently acquired a chart plotter/fish-finder and while I'm not much of a fisherman, I'd like to mount the transducer so I can use the depth sounder.  I'd prefer not to drill any holes in the boat, especially below the waterline (if possible).  I'm hoping to mount it in the hull below the "v" berth near the water tank.  Does anyone know if the hull is cored in this location.  In hull transducers require a solid core to work.
> 
> Thanks,
>     Peter
> 
> 
> [ Sent From rhodes22.net ]
>