An eccentric cove in the WW2 Air Transport Auxillary by the name of Douglas Fairweather was familiar with England and Scotland to such a degree, that he had no use for the clutter of charts of any scale and declined to carry them.
When rebuked by the Ministerial Bods for violating standing orders, he henceforth flew with one token chart: A map of Roman Britain.
Worked for him.