I have a Horizon MD-50 Display that has been doing fine, however of late it is producing widely inaccurate results. As my boat sits happily in its slip at the moment the display is reading a depth
of 35 Metres, the real depth
is about 3 metres. The Speed is reading 5.4knots.......
Ok what have I done so far??
-I checked the depth thru-hull when I slipped the boat, and seems is clean as, except for a new coat of antifoul of course, I know some people don't paint
over the Transducers, but I have been told that alot do and this shouldn't be a problem?
-There is only a small adjustment/caliberation possible on the unit, + or - a metre or two to set Keel
offset etc, but certainly not enough to sort out an error of 30+ metres....ditto for speed a small adjustment only....
-I have disconnected the depth thru-hull transducer and turned it off and on again etc, and with even with thru-hull disconnected it is still convinced that there is 35m of water
I'm at the point where I don't know what to try next....any ideas??
Or should I assume the display has had it and replace?
If I do replace the MD50 with another unit, would I also have to replace my Transducer or could it be made to work with a new unit? Ideally I would like to not replace the Transducer
Thanks in advance for any suggestions or advice.