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Old 07-22-2019, 08:41 PM   #1
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Linking GPS to Radio

I just acquired a new Standard Horizon VHF radio and I would like to link it to my old Garmin GPS. The manuals both say they are NMEA 0183 compatible. I spent some time trying to link them up to no avail. Any suggestions?Click image for larger version

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Old 07-22-2019, 09:39 PM   #2
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Should be fairly easy.
Just make sure you have the plotter out wires wired to the radio in wires and the + to +, neg. to neg..
The radio out to plotter in...

Top diagram on page 18 from your post I think will work.
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Old 07-22-2019, 10:05 PM   #3
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If you are trying to get GPS to the radio then use the radio’s blue and green wire. Don’t use any other wires. I don’t remember which one is + and -. Connect them to the Garmin NMEA 0183 output wires keeping + to + and - to -.
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Old 07-22-2019, 10:10 PM   #4
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Bear in mind you probably do NOT want to try taking any NMEA-0183 data out from the radio back to the plotter. Radio and plotter communication is sketchy, at best, and of limited usefulness even when it does work. Stick to handing the GPS data TO the radio and it'll be fine.

Trying to send 0183 data back out of the radio will likely require using another gizmo to handle combining the data (multiple talkers, listeners, etc).

It helps to include the make and model of any of the devices when asking for help.

Using search on their model numbers will often bring up threads that may have touched on the very same issue. Some might also have real-world "oh, that doesn't work the way the manual says it should" insights (ICOM radios, for example).
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Old 07-22-2019, 10:18 PM   #5
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Iím confused. If your new vhf has gps and your chart plotter already has gps, Iím not sure what you are trying to accomplish. What am I missing?
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Old 07-22-2019, 11:25 PM   #6
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I’m confused. If your new vhf has gps and your chart plotter already has gps, I’m not sure what you are trying to accomplish. What am I missing?
GX1600 is VHF only. GX1700 is VHF/GPS. If you want DSC capability on VHF only radio you must sort out the wire colors. DSC was a good idea but the implementation was a complete failure. All manufacturers used different colors, nomenclature and MMSI entry restrictions. EPIRBS are simple and easy to operate.
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Old 07-23-2019, 05:13 AM   #7
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If your standard Horizon has an internal AIS receiver you will want to push the AIS data (NMEA0183) to the Garmin chart plotter so that AIS targets will show. (This assuming your plotter has that capability) I have a Standard Horizon and a Garmin and do just that. You will only need to connect 1 wire from each unit. From memory the yellow wire from the Standard Horizon is the NMEA out. Don’t remember which is the “in” for the Garmin but it is in the instructions. There is a color code tag on the Garmin cable unless someone has cut it off. What are the model numbers of the Garmin and Standard Horizon?
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Old 07-23-2019, 06:10 AM   #8
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Originally Posted by Cigatoo View Post
If your standard Horizon has an internal AIS receiver you will want to push the AIS data (NMEA0183) to the Garmin chart plotter so that AIS targets will show. (This assuming your plotter has that capability) I have a Standard Horizon and a Garmin and do just that. You will only need to connect 1 wire from each unit. From memory the yellow wire from the Standard Horizon is the NMEA out. Donít remember which is the ďinĒ for the Garmin but it is in the instructions. There is a color code tag on the Garmin cable unless someone has cut it off. What are the model numbers of the Garmin and Standard Horizon?
Yep, models are hugely important, as not all models of plotters (or radios) are able to speak to each other. And even when the specs say it should work, it very often doesn't because of unique vendor screw-ups proprietary variations.
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Old 07-23-2019, 06:59 AM   #9
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Garmin typically uses a black common ground in the NMEA wiring, that would be RX- or TX-. The VHF uses independent grounds. This sometimes creates confusion in connecting the wires. It's just a matter of getting the two manuals and checking the wiring connections, matching up the color codes, and making the connections. As others posted, make sure the data you're trying to share is going to be recognized by the equipment you're connecting! If it's AIS, make sure the chartplotter can use the AIS sentences, and insure that the port you're sending it to is the correct baud rate. Typically AIS is ported at 38,400, there should be 2 NMEA ports on the chartplotter, make sure you're using the ports that the baud rate is the same, or it'll never work. You must RTFM for this stuff, if you start randomly connecting wires, you can damage the gear, can be fatal for the NMEA ports. Sketch it out, make sure your colors are correctly matched, observe the polarity, and turn the gear OFF when making connections. If you plan to integrate other gear, it may pay to install a terminal strip to make the other NMEA connections accessible for future connections.
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Old 07-23-2019, 07:03 AM   #10
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And if at some point you may starting thinking it'd be better to return/upgrade gear rather than try to bodge together a bunch of adapters.... you'd be right. Sometimes it's impossibly tedious trying to get old versions of X to talk to modern versions of Y, and it's just simpler/faster to use modern gear designed to work together (just not cheaper).

This is the "I told you so" post.
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Old 07-23-2019, 08:43 AM   #11
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Originally Posted by wkearney99 View Post
And if at some point you may starting thinking it'd be better to return/upgrade gear rather than try to bodge together a bunch of adapters.... you'd be right. Sometimes it's impossibly tedious trying to get old versions of X to talk to modern versions of Y, and it's just simpler/faster to use modern gear designed to work together (just not cheaper).

This is the "I told you so" post.
Isn't this the truth !!!
Seems the manufacturers want you to buy everything new every so many years.
And we put up with it....
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Old 07-23-2019, 08:51 AM   #12
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Isn't this the truth !!!
Seems the manufacturers want you to buy everything new every so many years. And we put up with it....
In fairness, the technology has been a fast moving target, and there's a lot of tedious little details. Stuff from the past 5 years is a lot 'less worse' than previous stuff.

That and understand the volume of unit sales to the marine market is TINY compared to just about anything else. Sure, there's a lot of common components involved, but high visibility, waterproof, corrosion-resistant stuff isn't cheap and not used in a wide range of stuff. Economies of scale don't happen with low numbers. But all the behind-the-scenes development costs still exist.

Still, all the proprietary crap deserves to die.
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Old 07-23-2019, 09:15 AM   #13
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Originally Posted by Cigatoo View Post
If your standard Horizon has an internal AIS receiver you will want to push the AIS data (NMEA0183) to the Garmin chart plotter so that AIS targets will show.
I don't believe either the 1600 or 1700 have AIS capabilities. AIS implementation isn't much better than DSC. Each manufacturer has a different opaque set of instructions and setting the baud rate is usually six levels down in some vague menu.

NMEA 01983/2000 are supposed to be standards but each manufacturer seems to want to lock you into their proprietary brand. AIS is worth the struggle. DSC not so much.
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Old 07-23-2019, 09:31 AM   #14
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Each manufacturer has a different opaque set of instructions and setting the baud rate is usually six levels down in some vague menu.

NMEA 01983/2000 are supposed to be standards but each manufacturer seems to want to lock you into their proprietary brand. AIS is worth the struggle. DSC not so much.
I have had good luck with NMEA 2000 interoperability. Everything just works. Plug and play.

NMEA 0183 does require use of the manuals, and the ability to connect a few wires together. But none of that is rocket science. I'm not known for having much patience, or spending much time with manuals, but even I can get through it. And once set up, you don't have to think about it again.

DSC has no value at all until you need it. Then it can be life-saving. You decide.
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Old 07-23-2019, 12:13 PM   #15
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Ok...itís a very old Garmin GPS, a 182C and a Standard Horizon GX1600. Itís just not a priority to upgrade the GPS since I cruise mostly in familiar waters, in site of land and when I do venture out further I use my iPad with Navionics loaded.
No AIS, I just want to be able to use the DSC if I ever need it.
I can purchase another GPS antenna for the radio but I thought if theyíre compatible, why bother.
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Old 07-23-2019, 12:20 PM   #16
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So all the responses above are from very knowledgeable people that seem to have been through this themselves. I knew my post would get quality responses. But would anyone like to give me which color wire on the radio goes to which color on the GPS?
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Old 07-23-2019, 12:54 PM   #17
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Originally Posted by slowandsteady View Post
So all the responses above are from very knowledgeable people that seem to have been through this themselves. I knew my post would get quality responses. But would anyone like to give me which color wire on the radio goes to which color on the GPS?
So you can absolutely push A GPS position from your 182c to your radio. The Blue wire on the Garmin is NMEA Out.
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Old 07-23-2019, 01:00 PM   #18
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Standard Horizon 1600 1700 manual on line says Blue is NMEA GPS + input and green is negative
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Old 07-23-2019, 01:09 PM   #19
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Pictures

Here are pictures from 182c and SH 1600 manuals. Google is your friend.
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Old 07-23-2019, 01:20 PM   #20
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I have both manuals and I did look at these exact schematics and I probably guessed right, Iím not sure, with no joy. Iíll have to try it again.
Someone told me that my old GPS may not even be putting out any info and that I can test it with an ohm meter. Is that true?
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