I believe Airmar makes most of the sensors for everyone. It's entirely possible yours is failing. But are the readings dependent on speed? Has it always had problems losing or mis-stating depth? Especially if you're moving? Because that could also indicate poor placement of the sensor, letting turbulence cause trouble.
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-- Bill Kearney
2005 Eastbay 47 FB - Solstice, w/Highfield CL360 tender
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