8.2.2 Gust . Rapid fluctuations in wind speed with a variation of 10 knots or more between peaks and lulls. 8.2.3 Light Wind . The wind is considered to be light when the speed is 10 knots or less. 8.2.4 Magnetic Variation .
Magnetic variation is the angle between true north and magnetic north.
Hourly Peak Wind Speed . The highest hourly instantaneous wind speed recorded that exceeds 25 knots. Variable Wind Direction . 8.2.7 Wind . As used in this chapter, wind is the horizontal motion of the air past a given point.