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post #1 of 5 Old 03-18-2012 Thread Starter
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Garmin GPSmap 451s and Raymarine Sounder

Hi, Im new to this forum & also have just purchased a new boat.

I already have a Garmin GPSmap 451s with a 200/50khz transducer. The boat is already fitted with a Raymarine ST40 Bidata with a transducer(200/50khz) and log.

My dilemma:- I wish to install the Garmin Plotter on the new vessel but still be able to use the Raymarine display. If I install both sounders I believe they may interfere with one another. So I am wondering if I can share the Raymarine sounder between the two units.

Any advice would be very much appreciated.

Thanks,

Daryl
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post #2 of 5 Old 03-18-2012
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Re: Garmin GPSmap 451s and Raymarine Sounder

Hello,

You 'should' be able to use both sounders at the same time.

I have a Lowrance unit with 50 / 200 sounder and an old Datamarine depth finder as well. when I first installed the Lowrance unit and turned it on, the Datamarine unit would blink 0 once a second or so. When I set my Lowrance unit to use the transducer on 50 hz only, the datamarine unit would work fine.

So see if you can set one unit to work at 50 hz and the other to work at 200 hz.

Good luck,
Barry

Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

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post #3 of 5 Old 03-19-2012 Thread Starter
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Garmin GPSmap 451s and Raymarine Sounder

Barry,

Many thanks for that. I'm looking into the set-up of both devices. The Garmin manual refers to displaying one frequency, I'm hoping that it also only transmits one! As yet I cant find a way of limiting the Raymarine ST40.

I have also read that changing the ping rates is a good way of achieving this. However I cant see how to do this on either unit.

I'll report back when I've made more progress.

Daryl
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post #4 of 5 Old 03-19-2012
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Re: Garmin GPSmap 451s and Raymarine Sounder

I'd say try it. I had a Garmin in-hull transducer about 12" from a raymarine thru-hull and they both worked great.
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post #5 of 5 Old 03-20-2012 Thread Starter
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Garmin GPSmap 451s and Raymarine Sounder

Im coming to this conclusion. Also I'm thinking that I may put a switch in line with the transducer on the Raymarine. This way if I have any problems I can turn off the transducer whilst still preserving the Log (I presume the Raymarine will just see this a fault whilst still operating as a log).

At the moment the boat is out of the water, it may be a few weeks before I can really test it.

Many thanks.
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