Nav Computer: Centre dot on TAS (270 kts), rotate to put wind direction (275šT) on HEADING index
and mark wind on centre line 30kts below centre dot (over 240 kts).
Rotate to put track 260šT next to
HEADING index; read drift (2š left (Port)) and rotate to put track (260š) under
drift (2šPort). On heading 262šT the drift 2šPort will give the
required track, 262šT and the groundspeed is under wind mark: 241 kts.