Humminbird Depth Finder model#000001?

[orienteeer]

this (ancient) humminbird came with our sport nautique, but no manual or info.
it works, and seems to be ok, except for cosmetics.
can somebody please help me calibrate it?
thanks in advance.

[charlesml3]

It's a Humminbird HDR 610. I had one in my 99 Air Nautique. Google around for an owner's manual. Some of those annoying sites have them and you'll have to find a way to get one downloaded.

[SilentSeven]

What makes you think it needs calibration...? Most all basic depth sounders work out of the box and don't need any setup.