[aprssig] Hardened APRS?

[Steve Noskowicz]

...  I don't know.  The Coast Guard system looks to be DSC based.  The Raytheon
system sounds much more complex and encrypted.

73, Steve, K9DCI

--- gerheim at cox.net wrote:

> Also look at http://www.navcen.uscg.gov/enav/ais/default.htm.  
> 
> This is a Coast Guard system that I worked on several years ago.  Unlike
> APRS, it's synchronous.  Every 20 ms or so, you get to send/receive a packet.
>  Works great for local VHF traffic.  
> 
> Full provision for packet crashes, etc... 
> 
> 
> ---- Dave Baxter <dave at emv.co.uk> wrote: 
> > http://www.raytheon.com/products/stellent/groups/public/documents/conten
> > t/cms01_052749.pdf
> > 
> > Or..  http://tinyurl.com/yscj2r  (goes to the above link)
> > 
> > Real Time Local Tactical Information?...
> > 
> > Sounds strangely familiar, "with bells on" by the sound of it...
> > 
> > 73.
> > 
> > Dave G0WBX.
> > This mail has been scanned by Palmer Cook Computer Services Limited. 
> www.palmercook.co.uk
> > _______________________________________________
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> 
> --
> -Al Gerheim, K1QN
> 
> HP-49G+ Software Page:
> http://members.cox.net/above
> 
> 
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