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Switch it on to extend the tip and place it on 1:500,000 chart. Read the flight distance along the blue stripe in nautical miles. Simply read off opposite the ground speed your estimated flight time.Rotate clip around if it obstructs the readings.
Switch it on to extend the tip and place it on 1:500,000 chart. Read the flight distance along the blue stripe in nautical miles. Simply read off opposite the ground speed your estimated flight time.Rotate clip around if it obstructs the readings.
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    Two 4P Pens will fly with you

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