[aprssig] Hardened APRS?
noskosteve at yahoo.com
Thu Nov 15 11:38:11 EST 2007
... 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.
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> -Al Gerheim, K1QN
> HP-49G+ Software Page:
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