ccvi, that only holds true if the plane is in close proximity to the gv. aka, the plane's FE "pops up" the trees. If your M16 is inside a forest and an enemy plane at d4.0 makes a dive on you, the m16 will have its view AND guns blocked by the trees, but the enemy plane will be able to see you AND shoot you AND hit you, because on his FE there are no trees. Its only until the plane gets real close to the gv/ground that he gets the ground clutter pop up.