This discussion about formation flying large aircraft begs a question.
Since the A400 is a tactical military aircraft, how come it does not have:
1. Eyebrow windows to provide visiblity when banking while flying in formation?
2. Knee windows to provide visibility on the ground when maneuvering on small austere airfields?
3. Electro luminescent formation lights?
Were these overlooked or does the A400 use a different solution to accomplish what these devices accomplish on other aircraft?