Hemisphere GPS LiteStar II Air, Руководство пользователя

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58
5: Flying a Pattern
P
ATTERN
G
UIDANCE
Pattern Types
There are two basic types of patterns - open patterns and closed
patterns. In an open pattern, you can fly an unlimited, or “open”
number of swaths because the pattern is not dependent on the size
of the field.
In a closed pattern, the number of swaths you can fly is limited, or
“closed.” The number of swaths you can fly is limited, because in
closed patterns you define the width of the field.
The A|B Line
Both open and closed patterns need an initial guideline on which to
base the pattern’s GPS coordinates. This initial guideline is called
the A|B line.
In an open pattern, point A of the A|B line is the beginning of the
line; point B is the end of the line. All swaths you fly will then be
parallel to this initial A|B line.
In a closed pattern, you also set points A and B to define your A|B
line. However, in a closed pattern, you define the width of your
field by setting a third point - the “C” point.
LiteStar will automatically prompt you to set your A, B, and if
applicable, C points according to the pattern you select.
Note: The A|B line may be inside or outside of the field. Points A
and B should be as far apart as possible to ensure the accuracy of
the line. Establishing A and B points too close together can result
in a small error that will create a large divergence over a long
distance.
LiteStar II Air.book Page 58 Thursday, June 7, 2007 4:02 PM