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Old 03-10-2015, 12:50   #46
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Re: Is AIS isolated or linked?

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Originally Posted by DotDun View Post
Since the documentation is sparse, I'll have to reverse engineer from a network dump when time is available.
As decoded by Actisense NGT ...
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Old 03-10-2015, 13:42   #47
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Re: Is AIS isolated or linked?

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As decoded by Actisense NGT ...
Then the $64,000 question is "what does that mean". Does it mean the device is a receive-only AIS and doesn't send own-ship info over the VHF channel? Or does it mean that the device doesn't send AIS reports over N2K for itself and only sends then our over VHF? Or does it mean that if it receives an AIS report over VHF and the MMSI matches it's own MMSI, it drops the report and doesn't send it over N2K? Or does it mean something else?

Don't you love reverse engineering?
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Old 03-10-2015, 16:18   #48
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Re: Is AIS isolated or linked?

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Then the $64,000 question is "what does that mean". Does it mean the device is a receive-only AIS and doesn't send own-ship info over the VHF channel? Or does it mean that the device doesn't send AIS reports over N2K for itself and only sends then our over VHF? Or does it mean that if it receives an AIS report over VHF and the MMSI matches it's own MMSI, it drops the report and doesn't send it over N2K? Or does it mean something else?

Don't you love reverse engineering?
I believe you can get the N2k docs for ~$2,000, won't cost $64k!

Without the the documentation, one can only guess what PGN 129039 Field 12 value 4 means. I'm guessing the Actisense explanation is close, but obviously needs more explanation.
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