| 1. | During the last 14 seconds, the rate of descent was extremely high.
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| 2. | A normal rate of descent is about 1, 500 feet per minute.
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| 3. | Their rate of descent could be maintained at approximately 500 feet per minute.
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| 4. | Irwin began reading the altitude, rate of descent and the projected landing site.
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| 5. | The pilot's primary control of the rate of descent is airspeed.
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| 6. | If it was reverse thruster it would not give this accelerated rate of descent,
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| 7. | The rate of descent then increased rapidly to more than.
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| 8. | It also could have controlled the plane's rate of descent.
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| 9. | The combination of a fast rate of descent and slow airspeed may become unsafe.
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| 10. | It measures flap settings, heading changes, power levels, rates of descent, and other parameters.
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