Well, buying a vintage boat is certainly a challenge. Twenty years does lay a lot of companies to waste on the business landscape but you all helped me find out what happened to my alcohol stove manufacturer, so I thought maybe we can get some help with this depth sounder. Does anyone out there know what might have happened to Electro Marine Systems Inc. (EMS) formerly of East Amherst, New York? Did someone buy them or they are they around somewhere where the internet can't find them under their old name? They are the outfit which built the electronic depth sounder/knot meter/log currently installed on my 1980 O'Day. Having a bit of trouble with the depth sounder reradout portion of the display while the knot meter is registering its digits fine in another area of the screen. Any leads on the source of the problem, the quick easy fix to the problem 
, or the whereabouts of the company or its remnants most appreciated... Also, any clue as to what frequency this depth sounder operates at could help me avoid having to replace the thru the hull transducer with what will no doubt otherwise be a different sized new unit. Fair Winds & Thanks, Jim
, or the whereabouts of the company or its remnants most appreciated... Also, any clue as to what frequency this depth sounder operates at could help me avoid having to replace the thru the hull transducer with what will no doubt otherwise be a different sized new unit. Fair Winds & Thanks, Jim