ASA Electronics E6-B manual Set 180 at the TRUE INDEX on the wind side of the computer

check came out to be 120 knots, and you calculate the true airspeed at your altitude to be 140 knots.

1.Set 180° at the TRUE INDEX on the wind side of the computer.

2.Move the slide until the grommet falls over the line marked 120. The true heading is 20° less than the true course, which means that you have a 20° left wind correction angle.

3.With the grommet on the 120-knot ground speed line, find the point on the slide where the 20° left wind correction angle crosses the line marked 140 and make a pencil mark (see Figure 24 on the next page).

4.Rotate the azimuth disk until the pencil mark is on the centerline between the grommet and the true index.

5.Determine the wind velocity by counting the lines between the grommet and the pencil mark.

6.Read the true wind direction under the true index. You should have a wind direction of 104° and a wind speed of 50 knots (see Figure 25 on Page 35).

If you have GPS, the direct track readout is used instead of true heading. Correct for variation, be- cause the direct track information is magnetic.

Sample problems: (Answers are on Page 38)

	TRUE	TRUE		GROUND	WIND	WIND
	HDG	COURSE	TAS	SPEED	DIREC.	VELOCITY
1.	320	315	140	128
2.	175	160	150	115

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