H2O-C users
I got fed up with not being able to see the screen in bright sun and it not registering speeds below1.3 MPH so I downgraded (with Lowrance's help) and went back to the B&W model. After I had already sent it back I was told by a Lowrance tech that if I turned the "track smoothing" feature off, it would show lower speeds. I had tried that but didn't reboot when I did it so I don't know if it works or not. You may want to try that and see if it consistantly shows speeds lower than 1.3 MPH. I'd be curious to know if it works.
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va