domd1979 said:-6.75 / -6.25 ....
fossyant said:-3 about..and that's hard to live with without glasses to hand..............
-3.75 / -4.75, guess I wont make an air traffic controller.Melvil said:An (un)fascinating fact about -3.0 uncorrected is that in the UK it is the dividing line for prospective air traffic controllers....as I found out a while back!