[aprssig] Was ADS-B to APRS Server NOW AIS to APRS

Pete Loveall AE5PL Lists hamlists at ametx.com
Sat Apr 26 07:50:46 EDT 2008

If there is and you want to implement it, do as Andrew has done and put it on a subnet separate from APRS-IS (also like FireNet).  This type of isolated subnet can be done with a stock javAPRSSrvr (FireNet uses javAPRSSrvr to prevent the massive number of objects it sees from appearing on APRS-IS).  On the other hand, if you want to gate just your boat using a translation to a ham object, that would be ham-related and the only thing to watch out for then is the possibility of sending a flood stream to APRS-IS.  This can be prevented by incorporating some sort of throttling.  D-PRS, for instance, has built-in throttling to prevent a steady stream of posits that the Icom radios send when in GPS mode.

Andrew made a good point that this type of application is not APRS nor is it ham related.  We have bandwidth limitations and all of the APRS-IS infrastructure is provided free-of-charge by hams for hams.  Experimenting is great as long as it does not adversely affect these volunteers or their operation.  Also, both ADS-B and AIS are commercial interests and would have significant usage implications if they started to show up on APRS-IS.  There also might be governmental restrictions in various countries as to the "retransmission" of this information over the Internet.

Just some thoughts as we experiment with new APRS bridges.


Pete Loveall AE5PL
pete at ae5pl dot net

> -----Original Message-----
> From: joe at dellabarba.com
> Sent: Saturday, April 26, 2008 6:10 AM
> To: aprssig at lists.tapr.org
> Subject: [aprssig] Was ADS-B to APRS Server NOW AIS to APRS
> On my boat I have APRS and AIS.
> Is there anything to convert the AIS data to APRS data and would anyone
> want to see it if there was?
> Joe
> N3HGB-5

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