While I was offshore
in deep water
my Moor Electronics
sounder started showing 000.0. I figured the depth
was just too great to get a good return signal. But since returning, the sounder has displayed other erroneous readings, sticking stubbornly at 90.1 in 15' of water
and then switching to something like 87.3. I know the bottom is clean, so it's not that. I also know I could cheaply replace it, but the bevel hole is quite large (same as for old datamarine inits) and I don't want to have to re-engineer all that.
Any ideas how to fix the existing unit?