I can usually hit mine pretty good..if I am moving at least 2 mph...any slower and I have a hard time...I took some of the orange markers..and painted them olive drab green making them a lot harder to see...I mark most of my waypoints from the back transducer...and I sit as close as possible to the transducer when I am relocating it. I toss a marker over when I see it on the depth finder, this gets me within about 10 feet or so usually. As far as the condensation...I had left my depthfinders on the boat under a shed all winter...both had condensation in them. I read a tip on here about putting them in white rice. I got a big gallon ziplock bag...put the depthfinders in there..and filled it full of white rice...left them in there about three weeks...cleared all the condensation up completely.. never would have believed it..if I hadn't seen it with my own eyes..and my were in pretty bad shape with the condensation.