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NSS and AIS problem w/SH GX2100

Old 10-03-2014, 07:28 PM
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Default NSS and AIS problem w/SH GX2100

My goal for today, was to send GPS data via NMEA 0183 from my NSS12 evo2 to my SH GX2100, and return AIS data from the GX2100 for overlay on the NSS. After a few frustrating hours experimenting and chatting with both Simrad and SH, I'm fairly certain this isn't possible - at least with what I have on hand.

The problem, as I understand it: The NSS can only be configured for one baud rate for NMEA 0183. Trouble is, the GPS NMEA feed to the GX2100 requires 4400, but the AIS feed back requires 38,400. I've verified this by changing the baud rate on the NSS back and forth...when on 4400, the GX2100 gets GPS info but no AIS overlay on the NSS. When switched to 38,400, I get AIS overlay info on the NSS - but lose the GPS signal on the GX2100.

So...what to to about this? Simrad suggested a multiplexer could resolve the issue, but a quick search shows they aren't cheap...and I'm somewhat loathe to keep adding complexity and more components to this setup.

I'm guessing I could feed my existing GX2100 with a NMEA GPS signal from something else, and just take AIS back to the NSS. But, while I've not tested it - I'm guessing I'll lose out on the ability to have a DSC feed from the GX2100, as it appears that too can only happen at 4400.

The simplest option seems to be upgrading the VHF. In looking at the SH 2200, it appears the integrated GPS would take care of my problem since I'd only need a one-way NMEA feed of AIS and DSC data back to the NSS. The specs state both of these can occur at 38,400 to MFD's with a single NMEA port, which would seem compatible with the NSS.

Or, perhaps a Simrad RS35? With N2K connectivity, I'm guessing all the NMEA issues disappear, correct? While this sounds like it might be a cleaner, plug and play install I'm assuming I'd lose the GPS redundancy I'd get with the SH 2200.

Anything I'm missing, or any other options I might consider?
Old 10-03-2014, 08:45 PM
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You don't have to get a VHF Marine Band radio with its own GNSS receiver. You could upgrade to the Standard Horizon GX2150 radio. The GX2150 can combine AIS and DSC data output, and accept GNSS data input, all on a single port, set to 38400 bps. This would directly interface with the single port on the NSS12.

See

http://www.standardhorizon.com/index...3&isArchived=0

http://www.standardhorizon.com/downl...pplication/pdf

I am surprised the NSS 12 has only one NMEA-0183 port. I guess SIMRAD figured most interconnection would be via NMEA-2000.

On the other hand, having a VHF Marine Band radio with its own GNSS receiver makes the radio a stand-alone system for making a DSC Distress Alert transmission with position data automatically linked from its internal GNSS receiver.
Old 10-03-2014, 08:47 PM
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buy a 2150, it'll send and receive at 38,4. the com ports 2100 was a big screwup and they fixed it with the 2150. older plotters had 2-3 com ports so you could use one for each. but most new plotters only have one if any.

I'm not firmilar with the newer 2200. I'm guessing it'll probably work too.
Old 10-03-2014, 09:47 PM
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Originally Posted by jhebert View Post
On the other hand, having a VHF Marine Band radio with its own GNSS receiver makes the radio a stand-alone system for making a DSC Distress Alert transmission with position data automatically linked from its internal GNSS receiver.
Kinda what I was thinking as well. Not to mention, a quick price check shows the street price of the 2200 w/integrated GPS is less than $30 more than the 2150.

Assuming the only difference is the integrated GPS, that seems like a worthwhile upgrade from the 2150.

And, given that I've already got the NMEA wiring figured out - I'm not seeing a benefit to going with the Simrad RS35. It's in the same price range as the other two, but like the 2150 it relies on a GPS feed from the NSS.
Old 10-03-2014, 11:18 PM
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You can get Lowrance Link-8 for $240.

http://www.boemarine.com/lowrance-li...ty-map-299-00/

Link-8 is identical to Simrad RS35 except for no support for wireless handsets for Link-8.

I replaced my GX1500 by RS35 just to get rid of the last NMEA 183 connection on my boat, I prefer by far the more robust NMEA 2000 cabling.
Old 10-04-2014, 05:43 AM
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Originally Posted by abbor View Post
You can get Lowrance Link-8 for $240. http://www.boemarine.com/lowrance-li...ty-map-299-00/ Link-8 is identical to Simrad RS35 except for no support for wireless handsets for Link-8. I replaced my GX1500 by RS35 just to get rid of the last NMEA 183 connection on my boat, I prefer by far the more robust NMEA 2000 cabling.
Actually less than that. We sell it for $230.00 with free shipping.

Mike
Old 10-05-2014, 07:16 PM
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I've connected the 2200 to the NSS evo 2, and it works good. I also have connected the RS35 (Link 8) to an evo2 system as well. Other than the connection (not sure why SH is still using the 0183), the RS 35 for what ever reason picks up more AIS targets, I've tested it with 2 boats that are docked 5 slips from each other in the same marina. Not sure why that is but we checked it 3-4 times.
Old 10-05-2014, 11:06 PM
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Originally Posted by mahimahi99 View Post
I've connected the 2200 to the NSS evo 2, and it works good. I also have connected the RS35 (Link 8) to an evo2 system as well. Other than the connection (not sure why SH is still using the 0183), the RS 35 for what ever reason picks up more AIS targets, I've tested it with 2 boats that are docked 5 slips from each other in the same marina. Not sure why that is but we checked it 3-4 times.
The RS35 is very sensitive. I'm about 12 miles inland (canals) - and I pick up boats 90-100 miles away. I had not expected that at all.
Old 10-06-2014, 08:44 AM
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Thanks much for the feedback, everyone - just ordered up a Link-8 from Mike.

Aside from the plug-n-play aspect, I also realized this will help with another issue I'm facing with the rest of my new install - wire routing. My only existing path to the upper console where this will reside is extremely tight, and there's no way I was going to get that bulky Simrad video/NMEA 0183 wire up using the current feed route. Given that there's already a pair of N2K devices planned up there, I'll just drop in another tee and be done with it.
Old 10-06-2014, 08:48 AM
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Sounds like a wise decision. It's not 100% plug-n-playl, you will have to configure Link-8 to use NMEA 2000 for communications and NSS as GPS source. The user interface is logical and easy to operate so this configuration is a simple task.
Old 10-06-2014, 09:47 AM
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Originally Posted by abbor View Post
The user interface is logical and easy to operate so this configuration is a simple task.
It is indeed...I'm quickly becoming a Simrad fan.

A test I tend to run on any new equipment, is how often I need to give up and open the manual. I've yet to do that for any software configuration or operational issues on the NSS...menus are extremely logical and well laid out.

Let's hope that continues to hold true as I get the AP, RADAR and WiFi hooked up...
Old 10-06-2014, 10:14 AM
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Originally Posted by kaz911 View Post
The RS35 is very sensitive. I'm about 12 miles inland (canals) - and I pick up boats 90-100 miles away. I had not expected that at all.
Yeah, it's a really good unit and for the money I think it's hard to beat.

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