Good Morning, I'm trying to help out my friends father that has the above locator on the bow of a newer G3. We are getting all kinds of erratic depth readings. I've read quite a few threads on this same problem. I haven't called HB yet, but was wanting to see if anyone has come up with a solution yet. We played around with it yesterday, however it was out of water. It would start like normal at 1.5 ft then all of a sudden jump to over 1000 ft. We originally thought it was the TM, which is a MK Maxxum. We unplugged it from the plug in receptacle, but had the same issue. We unhooked the units power supply and wired it to a seperate battery and still got the same readings. We did find out the boat motor tilt switch had a hot wire on, so we are wondering if maybe that would be causing the issue? Also, is there a way to tell what update its currently on the unit as he bought this unit last spring and it has not been updated yet. Any help or pointers would be greatly apreciated. Thanks!