I have an 18' center console and have a Humminbird 383c GPS/fishfinder combo. It is a great little unit but I find that it cannot find the bottom at any speed beyond a slow troll and whenever I arrive at a new location I need to turn the unit off, many times more than once before it finds the bottom again. Anything over 200' in the salt and it doesn't really work much at all. Has anyone had these same troubles? I have the transducer mounted on the transom on the right side of the motor looking at the boat from behind so it shouldn't be a prop wash issue. I am now looking at possibly getting a Lowrance 527. Slightly larger screen and better resolution but I am wonderng if the transducer is any better or if I will have the same problems finding bottom in the salt. Any suggestions? Does anyone have the Lowrance that can give some pros and cons? Thanks in advance.