I have anglers ask me regularly, “What kind of bottom reading do you get at higher speeds on your Raymarine fishfinder?” I tell them I get the same bottom reading as I do as when I am just put-putting along. The signal is strong and clear. The only think is that if I mark any significant structure, or fish, travelling at 30-40 mph, I have to stop, slow down and go back to find it.
The Raymarine HybridTouch shows you the bottom reading tracking clearly. A good fishfinder should track bottom both at slow and high speed. Another good reason to upgrade to a Raymarine unit.