Nav Computer: Centre dot on TAS (290 kts), rotate to put wind direction
(210oT) on HEADING index and mark wind on centre line 35kts below
centre dot (over 255 kts). Rotate to put heading 265šT next to HEADING index;
read drift and groundspeed under wind mark: 6o Stbd (right) (track
271oT) and 272 kts.