Hi I am using a Swedish topo map BD4 with a grid = SWEREF 99 TM and a datum = GRS 80.
My Etrex10 defaults to GRS80 when SWREF99 is selected.
However Basecamp defaults to datum = ETRS89 when the SWEREF99 is selected and does not allow any other selection.
If anyone can help with updating the grid / datum options this would be appreciated. Or a viable workaround.