On Mon, 26 May 08, waynard wrote:
I recently bought a boat and it
came with a sonar unit that has a weird kind of mottling or splotchy
film of some kind on the screen.

If it's brand new, it almost sounds like it may be the film that
protects the screen during packaging from the factory. It comes on
almost all new electronic gadgets. It's like a screen size sheet of
translucent Scotch tape. Just peel it off.

Rick