I'm sure there is an obvious answer to this ?

If you to the RAF Feltwell main page, look at the Google Earth image and look for the three golf-balls,
Concentrate on the left two golf-balls and look just north of those two and you’ll see a painted
oblong-square apparently painted on tarmac and in that square are a number of other painted icons etc...

What are they for ?

http://maps.google.co.uk/maps?oe=utf...29044992866644