Nav Computer: Centre dot on
top of square grid, wind direction (180ºM) under HEADING index and mark wind
speed 30 kts down from centre dot.
Rotate to put runway
direction (227ºM) under HEADING index and read the cross wind component to
right of centre line (22 kts).
Calculator: Wind
speed (30 kts) x sin47º (angle between wind direction
and runway alignment = 227º - 180º = 47º): 30 x 0.731 = 21.93.