With a Forerunner type watch I reckon you'd struggle to navigate a course well. With a handheld device, ie Garmin eTrex Legend and the topo maps, then yes you could.



When I do navigate courses with one of these I also carry a map and keep track where I am on the map as well. The handheld devices will give you an O/S co-ordinate, which the Forerunner watches won't.