Norcross Df2200Px Portable Depth Df2200Px

works great

Land N Sea H22Px Handheld Sonar does what it claims, it seems accurate on the depths, although the Temperature of the Water feature seems questionable, I use it all the time, one problem is the devise requires it to be in the Water to get readings, which is sometimes difficult to do, if the Craft you are in has high sides on it, for the price it does what it is advertised to do.