mixing it
ive no problem with either metric or imperial in fact i prefer imperial, the problem in aviation is that we use both systems! we give height and altitude in feet distances in nautical miles except for the old berlin control zone which had a radius of 20 statute miles. the reason for the berlin zones difference was due to field marshal montgomery. but to continue we give the met vis in metres and kilometres wind speed in degrees and knots and the temperaure in degrees celsius. aand the army use mils to direct their artillery, no wonder people get confused!