Does it work well enough at high speed? If NOT, then maybe a "raising device" might be called for. My depth finder is worthless when I get up on plane at top end speeds.
I run extreme shallows here in South Texas, but mostly at very slow speeds. My FF/Depth sounder tells me if I am in 10 inches of water, but, if I was running at speed...by the time it told me "too shallow" I'd be on the oyster reefs.
Best indicators around here are crab traps. If I can't see the top of them, then I have plenty of water. If the top mesh is just showing, then I still have 18 inches or so.....lots of water!
Watching for darker areas, which indicate oyster reefs, has saved my bottom more than once. If waves are breaking out in the middle of a body of water...whoops ... there's a reef there, too.
D5%%$$#b thing never showed me a fish that I caught, either. Ha Ha Seems they don't swim under my boat at two-foot depths. Can you imagine that?
richg99