On Nav
Computer: to find TAS; in the AIRSPEED window put temperature (-35ºC) next to
Mach No. Index go to MN (0.78) on the inner main scale
and read TAS next to it on the outer main scale: 469 kts.
On the other side put
centre dot over TAS (469 kts), rotate to put wind
direction (315ºT) under the HEADING index and mark wind speed 70 kts below centre dot (over 399 kts).
Rotate to put track (360ºT) under HEADING index and note drift is 7º Stbd (right).
Rotate to put track
(360ºT) under drift (7º Stbd).
On a heading of 353ºT the
drift is 6 Stbd, put the track (360ºT) under the 6 Stbd drift and note that on a heading of 354ºT the 6º Stbd drift gives the
required track, 360ºT.
Heading 354ºT, variation
10ºE, heading 344ºM.
Ground speed, under the
wind mark, is 418 kts and a distance of 600nm will be
covered in 86 minutes.
If the time at G is 1210
the ETA at B is 1336.