Finding Magnetic Track (Course)

FIRST: Convert Flight Planned Track to Mag.

SECOND: Convert Wind to Mag. (Wind is given in True in ARFOR)

i.e.Work both variables in Magnetic.






Eg YMEN to DNS:-

Heading is 104 (T), Mag variation is 12; FPT is therefore 092 M.

Wind is 220/25 Kts (T) or from 208 M.

TAS 105 Kts


- Place "circle" on 160 on the wind computer.
- Rotate azimuth scale to place wind of 208 M on the 208 index and mark "cross" of 25 ie 160+25=185 on the glass and call it the wind dot.
- Rotate azimuth scale again to place FPT of 092 under the index 092.
- Move the slide to place the 105 under the wind dot "cross".
- Read off the new Track and ground speed. If the "cross" is to the right then add to FPT. If the "cross" is to the left then minus from FPT.

Answer is 092+12=104 M and GS is 114 Kts.

So,

- FPT is 092M (This is also TMG or the path over the map or ground)
- TMG is also 092M
- HDG is 104M (Heading to adopt to make good a track of 092M)
- Drift is 12 deg LEFT