A model which can fly can take to the air and remain airborne if it wishes. The model is removed from the table during its movement phase and placed aside somewhere where it can be seen. The player points out that the model is flying high above the battlefield.
A model flying high in the air at the start of its turn can dive down anywhere onto the battlefield. It can attack an enemy unit if it wishes.
A model which is flying high above the battlefield cannot be shot at by troops on the ground, nor may it shoot at troops on the ground.