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Old 26-05-2012, 06:00   #31
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Join Date: Sep 2008
Location: from Houston, TX; currently berthed in Barcelona, headed west
Boat: Amel SM 53 - BeBe
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Re: AIS from VHF

Originally Posted by xymotic View Post
daisy-chaining devices definitely is fraught with peril.
Parallel connections of up to 3 NMEA listeners is doable and should not cause a significant voltage drop. The only "peril" may be connecting the devices without consideration for polarity, or the possibility of creating a "ground loop" which I mentioned and gave the solution for.

You may want to download a NMEA Monitor to check the sentences received at a particular COM Port. There are several free ones available. I use this one if I am working with chartplotting software that does not have a port monitor embedded in the software: Free NMEA Monitor


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ais, vhf

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