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Determine the approximate gradient required for an aircraft to descend 30 000 ft over a ground distance of 100 NM:

  • A

    1 %

  • B

    3 %

  • C

    5 %

  • D
    15 %

Climb Gradient

The ratio, in the same units of measurement, expressed as a percentage, as obtained from the formula:

  • Gradient (%) = (Change in Height / Horizontal Distance) x 100%

100 NM = 100 x 6076 ft

  • Gradient (%) = (30 000 / 607600) x 100% = 5%

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