Nav Computer: Centre dot on TAS (485 kts), rotate to put wind direction (130ºT) on HEADING index
and mark wind on centre line 75kts below centre dot (over 410 kts).
Rotate to put heading 168ºT next to
HEADING index; read drift and groundspeed under wind mark: 6º Stbd (right) (track 174ºT) and 428 kts.