Quote from Argonautical:
Could some please tell me the purpose of the very large red arrow that was positioned almost directly in front of the public grandstand? It points from the crowd line towards the runway and is there every year.
The large red arrow is the datum for displays, and indicates the centre of the display (I think).
As someone who has put it up (ok, supervised the lads putting it up) you have to be careful to point the arrow in the right direction i.e. away from the crowd! It has been done.