Welcome to the forum.
My boat has a Raymarine Tri Data w/ two transducers, a paddle wheel for speed and a depth transducer for depth and temperature.
The current instrument in their line is this i50 series.
https://www.raymarine.com/view/index-id=5125.html
Match the brand of other electronics on the boat for maximum compatibility.
There should already be a spot near the keel in the engine room for these transducers. Select the correct transducer to "match" the slope of the hull.
I'm a DIY so properly popping a hole in the hull and doing a great installation are fun for me.
On mine I set the offset to read zero when I touch, so no math required for skinny water.
Good luck.
