Thanks for the replies so far..
I suppose in terms of 'lethality' there are areas of a DZ that are 100% lethal, such as in the area between gun and target. Then this %age drops off towards the DZ edge, to what is considered by the cartographers to be a manageable figure (let's say 0.001%.)
Even outside this line there is still the remote possibility of an accidental round being fired by say a soldier who trips up whilst carrying his weapon.
One flight that I wanted to do was from Caernarfon to Sleap, via Bardsy Island (to see the Lighthouse and Chapel, etc.). Unfortunately I was unable to get the crossing clearance from Valley, who said the range was live. My proposed flight path would have taken me just a couple of hundred yards into the DZ 201, which is over the monks on their Island.
I suppose the line has to be drawn somewhere, at some arbitrary percentile.
Last edited by phiggsbroadband; 13th December 2013 at 18:20.