A waterproof ACE is awesome, but how will it do in the salt water without having multiple frequency ???? I would think that it would be just like the ACE 250 were you would have to turn the sens. way down to stabilize it, (if you can even get it stabilized!) most the time i could not even touch the salt water without it freaking out. We all know that when we turn the sens. down we lose depth! I GUESS IF THEY ADDED MULTIPLE FREQUENCIES, White's and Minelab would have to lower their prices to compete.