This ground speed timer lets you calculate accurate Estimated Time of Arrivals for VFR pilots! Simply place the calculator at your position on the map and, using the appropriate ground speed scale, and read-off the time to the desired point or distance.
Alternatively use by recording the elapsed time over a known distance to calculate ground speed. Usable at ground speeds from 50 knots to 140 knots for 1:500,000 scale maps.
This ground speed timer lets you calculate accurate Estimated Time of Arrivals for VFR pilots! Simply place the calculator at your position on the map and, using the appropriate ground speed scale, and read-off the time to the desired point or distance.
Alternatively use by recording the elapsed time over a known distance to calculate ground speed. Usable at ground speeds from 50 knots to 140 knots for 1:500,000 scale maps.
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