This is (or should be) a
relatively straightforward whiz wheel calculation.
1. Centre dot over top of
wind grid.
2. Set wind direction
(320°) under Index.
3. Mark windspeed (30kt)
below wind grid line.
4. Move wind scale down
to centre dot over TAS (125kt).
5. Rotate disc so True
HDG (355°) is under Index.
6. Establish drift as 10°
Right/Starboard, so ADD this to the True HDG to get a True Track of 005° (your
aircraft is being blown to the right, so your True HDG will be left of Track to
compensate).
7. Read off the GS of
102kt.