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.

Choose your answer: based on the paragraph above can we conclude that "To find ground speed using a graphic flight computer you align the grid so the center grommet is over one of the heavy lines."?

Select from the following.
 (A). Yes;
 (B). It's impossible to say;
 (C). No;
I think the answer is
(A).