When I went in to motor pool near Agios Efstratios I noticed big fps drop while looking at village. Than I checked all the buildings (4) and views around the base and found out that looking at Military Cargo OP V1 (tower thingy) is the reason for the drop.

I checked my fps through Bandicam so initial fps might be lower than in game without fps overlay:

When looking any where around motor pool I get 45-60 with occasional drops to 35ish. If I stop moving fps stabilizes between 50-60. But when looking (without moving) at the tower my fps drops to 34-36 and doesn't change much if I stand close (screenshot attached) or 20m from the tower. Drop doesn't depend on how much tower there is in the view. {F18006}