As I understand the shadow on the map is the actual location
.
The plane‘s icon and shadow on the map only show your
estimated position .. You need to match the plane icon and it's shadow to your actual position in 3D.
To find you actual position..Go to the 3D outside view ( I think it’s F2) or ball turret. . Then look straight down to the ground . You should see the shadow of the your plane formation moving across the ground. That is your actual position. Your job is to match the plane icon and it’s shadow on the navigators map to your actual position in 3D by moving the plane icon on the map.
Also won't bother with the drift meter until passing the IP.
I don’t want to leave you with the impression that the drift meter is of no help before the IP. Knowing the direction of the wind drift can be helpful. For example, if you know that your formation has been pushed by wind drift, to the left since your last fix, you know that your current track lies to the left of your desired course and your next landmark fix will be to somewhere to right. You can also use wind drift for dead reckoning navigation… but that’s a whole another topic.
Hope this helps.
Vox