I have only seen a couple of the marker arrows for bombing ranges but they have been flat on the ground. I wonder how common raised ones like this were?

http://goo.gl/6EvvC

The field had very prominent white line from that corner to the centre where there was a small white circle (1946 aerial photo). I was told at a local farm that the field was called the Target so perhaps it was used for low level precision bombing practice?

MB