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.
Azimuth plates can be rotated.
( z1 possible :ARG1 ( z2 rotate :ARG1 ( z3 plate :name ( z4 name :op "Azimuth" ) ) ) )