The desired QDM is 090° and, according to the forecast wind, the Pilot decided that, so as to achieve a QDM of 090°, the aircraft must fly on a planned magnetic heading (MH) of 095° and the RBI must indicate 355°.

We know that:

• The Relative Bearing Indicator (RBI) indicates the relative bearing 355°, which is the relative bearing measured from the aircraft's heading 095°.
• The Magnetic Compass indicates the magnetic heading 095°, which is where the nose of the aircraft points (the fore and aft axis).

The planned MH 095° is greater than the QDM 090° (applying right pedal), due to a crosswind component coming from the right.

In general, to get a magnetic bearing to the station (QDM), add the magnetic heading to the relative bearing (if it is more than 360°, then subtract 360°):

• Planned QDM = MH + RB = (095° + 355°) - 360°= 090°

But, things did not go as planned and after 6 minutes the RBI indicates 358°, instead of 355°. So, the aircraft maintaining the same heading 095°, will be on QDM:

• Actual QDM = MH + RB = (095° + 358°) - 360°= 093°.

Since, the actual QDM is 093°, instead of 090°, it means that the crosswind component (coming from the right) increased, drifting the aircraft to the left and the Pilot has to increase the MH (more than 095° - applying more right pedal) to compensate for the wind, so as to follow the desired QDM 090°.