linking autopilot, radar, yeoman plotter to gps.

pandos

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How many things can work from the output of the gps, Last year I had the Autopilot working fine but failed to get the radar to act as repeater or the yeoman plotter to work correctly.

The wiring was a mess but this year it will be different. /forums/images/graemlins/laugh.gif
 

duncan

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sorry to say but 'not necessarily..........'

you will be extremely fortunate if all units are happy to take the same version of the data message from the GPS, even if it is up to sending the message they want!

as an example I have an older Garmin plotter (215/225) which feeds a Lowrance Sonar/plotter. THese were happily chatting with a 0183 v 2 sentence. Adding a JRC 1500 (Mk 1)radar it refused point bank to act as a repeater or plot waypoints until I changed the output from the Garmin to the v 1.5 message. Fortunately the Lowrance was happy with this too so all was well..........until I add a DSC radio. This, quite reasonably I suppose, requires the later v 2 sentence so the radar is now going to have to go without.
 

pandos

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I have tracked down the handbooks for all of the instruments, and the remote for the autopilot. Each manufacturer speaks a different language but everything seems to want the same version of nmea. I am going to wire the power supplies and bring all the data to a convient point, then someday I am feeling very patient I will try by science or trial and error what can be made talk to what. It is possible that I will need to put in some switches on the data lines because the yeoman becomes a talker at some stages and will clash with the gps if they are both connected to the radar.

Thanks again.
 

duncan

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If the Yeoman becomes a talker it will only do so via a seperate interface ie an NMEA out, and it will only be listened to by something via an NMEA in, so there can be no need for any switches unless you wish to be able to switch input to a device from 2 possible sources. There was a good thread on here a few months ago about this in the context of redundancy. However here you have one GPS source feeding position data via an NMEA data out interface so just connect them all up to work on the same sentence, connect the NMEA +ve cables together and the NMEA -ve or unit grounds as appropriate.
Hope it all works for you.
 

tome

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If they comply with the NMEA standard, one talker can drive at least 10 listeners. No two talkers should ever be connected together unless through a multiplexer.

The GPS output should drive all the devices you list unless there is a compatibility issue with which revision of NMEA they require.

The Yeoman can send waypoints back to the GPS which can be very useful, so connect the NMEA OUT (A) from the Yeoman (green wire) to the NMEA + input of the GPS.
 

philip_stevens

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Tom,
[ QUOTE ]
The Yeoman can send waypoints back to the GPS which can be very useful, so connect the NMEA OUT (A) from the Yeoman (green wire) to the NMEA + input of the GPS.

[/ QUOTE ]

One exception I know of - my Navman 5500 - will not upload from a Yeoman.

At last years' Soton boat show, I had a word with both Navimo's Mark, and Yeoman's Robin, and both agreed that this was the case.
 

tome

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A limitation of the Navman products seems to be that they have no external way of accepting waypoints - not even via an NMEA WPT sentence. Pity - this is where Garmin score well against them as you can upload from a plotter or most PC based charting software.

If planning a voyage, you can sit at home choosing suitable waypoints and upload them on the next visit to the boat.
 
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