AFE AS-4 Nautical Ruler 1:1 million/500,000

AFE’s popular 41cm / 16″ scale rule design but with the outer edges marked with kilometres in 1:500,000 & 1:1,000,000 scales, are for those countries where flight planning distances are measured in kilometres. The centre line is marked with nautical miles and kilometres in 1:500,000 scale.