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Old 01-03-2014, 19:21   #1
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Garmin 4212 chartplotter issue

My Garmin 4212 chartplotter losses satelite and remote signal when ridding on a little choppy seas. As soon as the boat starts hitting some waves, the unit goes with it. It works fine if the water is smooth. Please help.....
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Old 01-03-2014, 19:28   #2
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Re: Garmin 4212 chartplotter issue

External antenna?
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Old 01-03-2014, 19:40   #3
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Re: Garmin 4212 chartplotter issue

Could be the nmea connections are not secure. I had an issue with the connections in my engine room which got very warm. Connectors were above the engine. Relocated and no issue.


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Old 01-03-2014, 19:41   #4
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Re: Garmin 4212 chartplotter issue

Where is your antenna?
Under your seat or where somebody lays their arm?

I have a 5208 with the antenna slightly off center under a windshield and the boom.
It has no problem.
I've done a test on the screen where I can see the satellite reception, and if I put my hand over the antenna, most of the satellites disappear.
Taking my hand off, they reappear in a few seconds.
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Old 02-03-2014, 11:46   #5
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Re: Garmin 4212 chartplotter issue

My antenna is on the T-Top of the boat.
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Old 02-03-2014, 12:03   #6
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Re: Garmin 4212 chartplotter issue

You need to inspect and tighten every connection between your antenna and the unit.
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