On 12 Feb, 14:10, "John Rowland"
wrote:
Roland Perry wrote:
In message
,
at 05:02:55 on Tue, 12 Feb 2008, Mizter T
remarked:
I've never really used a sat-nav system

Do they display a GPS speed?

TomTom does. It gives lat long as well.

It doesn't give height, though. Is it hard for GPS to be used to determine
height above sea level?

Mine does (BMW sat-nav), along with north/south etc. Not had much use
for it, but I guess it could be handy for figuring out if you're on a
flyover, or the road undreneath for navigation purposes.