212 - ATPL Question Bank in English - On a spherical-Earth north polar stereographic chart, two points lie on 60°N. Their Earth convergence, calculated as longitude difference × sin 60°, is 20°. Using 1 NM per minute of angular distance, what is the maximum cross-track distance between the great-circle path and the straight chart line joining them, rounded to the nearest 0.1 NM?

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