| 21. | His average ground speed over the flight was.
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| 22. | Some basic processing occurs on the radar tracks, such as calculating ground speed and magnetic headings.
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| 23. | Ground speed is quite different from airspeed.
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| 24. | Ground speed radar can measure it directly.
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| 25. | Ground speed is used for navigation purposes.
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| 26. | Or at a ground speed of zero.
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| 27. | The flight consisted of 246.5 hours of flight time at an average ground speed of 117 mph.
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| 28. | Now all that remained was a measurement of the wind speed, or more generally the ground speed.
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| 29. | The lift has a component in the direction you're tracking, which works to increase your ground speed.
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| 30. | If his ground speed was, he would begin his descent about from his destination ( traffic permitting ).
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