On Nav
Computer: to find TAS; in the AIRSPEED window put temperature (-20ºC) next to
pressure altitude (FL180), go to CAS (210kts) on the inner main scale and read
TAS next to it on the outer main scale: 275 kts.
On the other side put centre dot over
TAS (275 kts), rotate to put wind direction (050ºT)
under the HEADING index and mark wind speed 40 kts
below centre dot (over 235 kts).
Rotate to put track (270ºT) under
HEADING index and note drift is 5º Port (left).
Rotate to put track (270ºT) under drift
(5º Port).
On a heading of 275ºT the 5º Port
drift gives the required track, 270ºT.
Heading 275ºT, variation 7ºE, heading 268ºM.
Groundspeed, under the wind mark, is
304 kts and a distance of 300nm will be covered in 59
minutes.
If the time at A is 1015 the ETA at B
is 1114