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(Answers are on Page 38)
GROUND SPEED FEET PER MILE FEET PER
REQUIRED MINUTE
1. 120 350
2. 100 250
3. 150 300
Off-Course Problems
When you navigate by pilotage, you will occasion-
ally find your airplane has drifted off the planned
course due to the wind. If you find yourself over a
landmark to one side of the course line you should
be able to estimate the distance you have drifted off
course (the scale of sectional charts is 8 statute
miles to the inch), and your flight log should help
determine how far you have flown and how far it is
to your destination.
Two computer setups are required. The first will
give you the heading correction necessary to offset
wind drift, or “course to parallel.” On the middle
scale, set the distance flown opposite of the dis-
tance off course on the outer scale; the rate arrow
points to the degrees of heading change to parallel
the course.
Example:
After flying 125 miles, you note that
you are 8 miles off course.
(
See
Figure 17.)
1. Set 125 on the middle scale to line up with 8
on the outer scale.
2. Read approximately 3.8° at the rate arrow.
The second setup will give you the additional head-
ing change required to fly back to the original course
line. On the middle scale, set distance remaining