On 4 Jan 2006 09:13:11 -0800, "Capt John" wrote:

they are expensive, in the area of $1000

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Yes but they also contain a GPS for precision position reports. It
was not clear to me from Karen's description whether or not the less
expensive Australian units had an internal GPS or not. Without a GPS
position can still be vectored from the satellite reporting system but
it is less accurate.