On Nav
Computer: to find TAS; in the AIRSPEED window put temperature (-55ºC) next to
Mach No. Index go to MN (0.84) on the inner main scale
and read TAS next to it on the outer main scale: 483 kts.
On the other side put
centre dot over TAS (483 kts), rotate to put wind
direction (020ºT) under the HEADING index and mark wind speed 60 kts below centre dot (over 423 kts).
Rotate to put track
(070ºT) under HEADING index and note drift is 6º Stbd
(right).
Rotate to put track
(070ºT) under drift (6º Stbd).
Note that on a heading of
064ºT the 6º Stbd
drift gives the required track, 070ºT. Heading 064ºT, variation
11ºW, heading 075ºM.
Ground speed, under the
wind mark, is 441 kts and a distance of 495nm will be
covered in 67 minutes.
If the time at L is 1355
the ETA at M is
1502.