Got a twin big HP mains running across the farm. Has those fire hydrant like markers in the hedgerow where it enters and exits each field. Not a great help when I know in one of the fields there is a bend so if you drew a line between the markers, you'd be well out! I get a calendar off them each year and a letter to fill in to say I still own the land. They fly over weekly and only ring up or drop in if I'm having an event setting up as they fly over and say the same thing, please don't put a marquee on top.