All, I have an original equipment depth sounder and knot meter on my boat. The depth sounder frequently goes to decimal digits and once it does this it seems it takes forever for it to register normally. I have read the manual and it has said to adjust the gain to a different setting. Even this does not seem to resolve the problem most of the time. I also have checked the transducer to make sure it was not obstructed by some sort of growth. Does anyone have any suggestions on how to resolve the problem? Next, although I rely on my GPS to give me an accurate speed, it would be nice if I could get the knot meter to work. All it displays is 0.0. I have checked the wheel on my hull and it moves freely. Does anyone have ay suggestions on where the problem may be?