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determining wind speed
Wind speed is given here in the units of "knots" (knt).
A "Knot" is a nautical mile per hour.
|1 Knot = 1.15 Miles Per Hour (MPH)
1 Knot = 1.9 Kilometers Per Hour (KM/HR)
Each short barb represents 5 knots, each long barb
10 knots. A long barb and a short barb is 15 knots, simply by adding
the value of each barb together (10 knots + 5 knots = 15 knots).
If only a station circle is plotted, the winds are calm.
Pennants are 50 knots.
Therefore, the last wind example in the chart below
has a wind speed of 65 knots. (50 knots + 10 knots + 5 knots).