To the nearest 100.
Well that would make it 100 then, multiplied by 10,000 unmarked airstrips = 1,000,000 extra radio calls, possibly on ATC freq's.
My God creamy, you're right. Aluminium is going to rain! hehehehe.
In the meantime, I'm not looking forward to listening to the radio chatter to work out what is significant to me, and what is going on way below in farmer McKenzies paddock and whether farmer McKenzie has blocked out a call that was important to me and the 500 or so others along for the ride.
CAsA had better prepare themselves, if this lunacy is not amended.