A continuous record on a chart of an aircraft's tracks and distances flown. The position of the aircraft, determined by pinpoints, fixes, or DR (dead reckoning) calculations, is plotted at intervals on a chart. These positions are used to determine the aircraft's progress and to calculate future positions, ETAs, and any corrections of headings that may be necessary. To plot the actual track line on the chart, one needs to know an actual starting point and an actual "along the track" point of the aircraft.
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