i haven't watched the film, but i have gotten kills without line of sight, simply by ranging a set target and having a pilot direct fire for me, then using what i do see as a reference, such as a tree in the tree line plus 2 k on the rangefinder =main vh, left one inch and down to 1.5 k = soft gun, so on and so forth, if it is in a map that we use a lot, these numbers are not hard to remember, some even write this stuff down! now all you need is a target to go to that spot, and some way to know he is there,IE an observer, i have some good squaddies who can direct my fire to hit tanks within three or four shots that i never see! those kills are fun, and generally result in a
YOU CHEAT message on 200 or a PM!
on the maps where you can shoot from one base to another, always shooting from the same spot on your feild will help you to figure out what to look at in your line of sight, to hit targets beyond it!
also don't forget someone else could be in the tower calling out the shots and directing fire for the shooter, it works for me!