Nav Computer: Centre dot on
TAS (170 kts), rotate to put wind direction (350ºT)
on HEADING index and mark wind on centre line 30kts below centre dot (over 140 kts).
Rotate to put heading
100ºT next to HEADING index; read drift and groundspeed under wind mark: 9º Stbd (right) (track 109ºT) and 182 kts.