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A. Navigation Calculator
1. Calculation of time required
Problem:
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 (
Y
). 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.
15. Using the Slide Rule Bezel
Flying distance and other navigation
calculations as well as general
calculations can be performed using the
slide rule bezel located around the outside
of the dial. This slide rule bezel is not
able to display decimal places for
calculation results, and should only be
used as a general reference as an
alternative to more accurate calculations.
Turning the crown at the 8:00 position
allows the slide rule bezel around the
dial(Outside Scale) to be rotated.
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Crown for turning the outer scale
Inside scale
Outside scale
