How to use a graphic flight computer to find ground speed and true heading<br>Align the wind direction under the " true index " mark by rotating the azimuth plate. If the winds are from 330 ° at 20 knots, align 330 under the true index. Align the grid so the center grommet is over one of the heavy lines.
To find ground speed using a graphic flight computer you align the grid so the center grommet is over one of the heavy lines.
You must also align the wind direction under the "true index" mark by rotating the azimuth plate.
( z1 align :ARG0 ( z2 you ) :ARG1 ( z3 grid ) :purpose ( z4 find :ARG0 z2 :ARG1 ( z5 speed :mod ( z6 ground ) ) :manner ( z7 use :ARG0 z2 :ARG1 ( z8 computer :instrument-of ( z9 fly ) :mod ( z10 graphic ) ) ) ) :purpose ( z11 be-located-at :ARG1 ( z12 grommet :mod ( z13 center ) ) :ARG2 ( z14 over :op ( z15 line :ARG1-of ( z16 include :ARG2 ( z17 line :mod ( z18 heavy ) ) ) ) ) ) )