> I would love to have an instrument that tells me exactly where I am on a
> map.
> I carry a GPS and sort of work out where I am.
> The instrument that I envisage would have a little wheel that moves over
> the
> map and records the GPS positions on the map similar to a cursor on Google

Ahhh... I can do this just by reading the grid coordinates on the edge of
the map.
Why on earth would you want to carry extra weight, and batteries, just to do
this electronically?????
Come on guys - BRAINS!

Cheers
Roger
PS: I can work out where I am without a GPS too, but that is a separate
story.