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0043
It is possible to fly an aircraft just clear of the ground at a slightly slower airspeed than that required to sustain level flight at higher altitudes. This is the result of
| | A) interference of the ground surface with the airflow patterns about the aircraft in flight. |
| | B) a cushioning effect of the air as it is trapped between the ground and the descending aircraft. |
| * | C) ground interference with the static pressure system which produces false indications on the airspeed indicator. |
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