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post #1 of Old 12-21-2009 Thread Starter
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Depth Gauge Question

I have an old Navco 200 series depth gauge on my even older Catalina 30. When I first turn it on, it registers the correct depth about 12 in my slip. After a few minutes the indicated depth begins creeping slowly upward until it shows around 120 feet. Then it begins to slowly creep back downward to the correct reading, whereupon it begins the whole cycle over again. Can anyone offer any insight as to a probable cause/cure for this behavior, or a source for support for these old Navco sets?

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