Thanks to you both Kieth and Dowind24, this helps a lot !
A few more questions to make sure I get it right...
* 1.
Keith: to make it 100% correct, the meridian convergence shouldn' t be computed this way :
C = 94°55,3' * sin(mean latitude)
= (94+55,3/60) * sin([74,73°+71,92°]/2) = 90,2°
So the grid course to follow to reach the VOR should be 90,2° Grid.
Adding 6° drift correction angle to the right and my grid heading would be 96,2°.
The VOR RMI would still mark 000° with its arrow positioned with a relative bearing of 96,2° to the left.
*2.
If the instrument used was an ADF, it would have been quite different, right ?
I still would have taken a heading 6° to the right of the true course to correct for cross wind and the arrow of the ADF would have marked a 6° relative bearing to the left. Thus the bottom left picture in the annexe (
http://www.cours-de-math.eu/Drift-left.jpg) would have been the correct one. Is that correct ?
Again thanks a lot to you both for helping us so well.
Have a good day,
Emmanuel Cordier.