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A. Navigation Calculator
1. Calculation of time required
Example: How long does it take an airplane flying at 180 knots to fly a
distance of 450 nautical miles?
Solution: Set the 18 mark on the outside scale to the SPEED INDEX ( ).
At this time, the point on the inside scale that is aligned with 45 on
the outside scale indicates (2:30), and the answer is 2 hours and 30
minutes.
2. Speed (ground speed) calculation
Example: What is the speed (ground speed) of an airplane when it takes
1 hour and 20 minutes to fly a distance of 240 nautical miles?
Solution: Align the 24 on the outside scale with 1:20 (80) on the inside scale.
At this time, 18 is aligned with the SPEED INDEX ( ) on the
inside scale, and the answer is 180 knots.
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