[GRASS-user] Search and Rescue Volunteer Groups

[Curt, WE7U]

On Tue, 5 Feb 2008, Sampson, David wrote:

> I think a prser for incoming APRS is probably what is required. I know
> very little about APRS so I thought it was uni-directional. Could you
> also send locational taks, like a "now go here" type packet back through
> the system?

Yes.  Bi-directional messaging is part of the spec.  You can also
send objects over the air and if the field personnel have the proper
equipment then these may appear as waypoints on their GPS or on a
laptop in a truck.  Of course all of this requires at least one
amateur radio licensee to be the control operator.

Be aware that a lot of the handheld APRS sytems out there _are_
unidirectional and therefore have no receive or messaging
capability.  With those systems all you can do is plot their
position on the map screen.

--
Curt, WE7U: <www.eskimo.com/~archer/>     XASTIR: <www.xastir.org>
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