b337
A far as I can remember LORAN ground waves had a range of around 600 miles but skywaves, which bounced off the ionosphere, had a range of around 1500 miles. The problem was, if you were around 500 to 800 miles from the ground stations, you had to be very careful to recognise which was which. If you lined up a ground wave return with a skywave you got a totally erroneous result - as I once found out to my cost!