If I remember correctly, the Long Range Desert Group used a sun compass for driving in a known direction, by mounting one on the bonnet of their vehicle. But, they kept having to make adjustments throughout the day as the sun progressed.
Couldn't they have mounted it on a (clockwork in those days) table which rotated once in 24 hours anticlockwise - then once set, they could drive all day to the same setting? Or am I missing something. Mike Shaw Wirral, UK 53' 22" N 03' 02" W
