On Nav Computer: to find TAS; in the AIRSPEED window put temperature (-40ºC) next to Mach No.

Index go to MN (0.82) on the inner main scale and read TAS next to it on the outer main scale: 487 kts.  

On the other side put centre dot over TAS (487 kts), rotate to put wind direction (140ºT) under the HEADING index and mark wind speed 60 kts below centre dot (over 427 kts).  

Rotate to put track (090ºT) under HEADING index and note drift is 6º Port (left).  

Rotate to put track (090ºT) under drift (5º Port).  

On a heading of 095ºT the 5º Port drift gives the required track, 090ºT.  

Heading 095ºT, variation 10ºW, heading 105ºM.  

Groundspeed, under the wind mark, is 446 kts and a distance of 300nm will be covered in 40 minutes.  

If the time at E is 1125 the ETA at B is 1205.