Refer to figure.

Using the flight computer:

(1) Place the centre of the rotating disk on the value representing the Ground Speed (128 kt).
(2) Place wind direction (308º) under the true index
(3) Mark wind velocity downwards from the centre. It can be done from arbitrary positions, only magnitude is important. (i.e Vw = 32 kt, if centre is on 128, mark wind on 96).

NOTE:

When the question provides a track => mark wind velocity upwards from centre.
When the Heading is known => mark wind velocity downwards from centre.

(4) Place your true heading (340º) under the true index
(5) Move the slide to put the end of the line you drew over the Ground speed. Read the drift of 8ºR.
(6) The centre dot will be over the TAS: 154 kt .

Using drift angle and heading, determine track:
Drift angle is how many degrees the heading is to the right or left of the track. Always remember that the drift angle is always measured with reference to the heading.

• Drift Angle: 8ºR
• True Track = True Heading + drift angle
• True Track = 340º + 008º = 348ºT