Erratic depth readings

[MercMan]

I have two fish finders in my boat. One is my main one, which is a Lowrance X-65. My secondary one is an Eagle cuda. Every once in a while each depth finder will start acting real strange and start reading unbelievably weird depths. They don't usually do it at the same time, but they both do it. All of a sudden it'll start going to 60 feet, then 120, then 480, then 600, etc. Sometimes the depth reading flashes on my X-65. Then after a period of time (varies) the depth finder will come out of it and be normal again for a while. Then it'll do it again. Does anyone know what causes this? It drives me nuts when I'm coming onto a hump or coming off of a hump and my depth finder goes into oblivion. Thanks.

[moving to equipment forum]

[This message has been edited by Rick (edited 07-12-2004).]