On CRP-5:
To find TAS, in the AIRSPEED window put temperature (-10ºC) next to pressure
altitude (FL160)
Go to CAS (175kts) on the inner main scale and read TAS next to it on the outer
main scale: 226 kts.
On the Wind Side put centre dot over TAS (226 kts)
Rotate to put wind direction (320ºT) under the TRUE HEADING index and mark wind
speed 50 kts below centre dot (over 176 kts).
Rotate to put track (180ºT) under TRUE HEADING index and note drift is 7º Port
(left).
Rotate to put track (180ºT) under drift (7º Port) and note that drift has
changed to 8º Port so put 180ºT under 8ºP.
On a heading of 188ºT the 8º Port drift gives the required track, 180ºT.
Heading 180ºT, Variation 5ºW = Heading 193ºM.
Groundspeed, under the wind mark, is 262 kts
A distance of 480nm will be covered in 109 minutes (1
hr 49 mins).
If the time at C is 1050 the ETA at D is 1239.