So, they had no transits at the time Stonehenge and the related monuments were built, yet the monuments for a series of isosceles triangles that "point" to the next site. Many are 100 miles or more away, but GPS co-ordinates show all are accurate to within 100 metres. How do you make a straight line on the ground for over 100 miles without trig and celestial navigation (which supposedly were developed much later according to the modern historical paradigm)?