What is one advantage of using helicopters in air assaults?

Using helicopters in air assaults offers a significant advantage in that they can access remote and difficult terrains. This capability is crucial during operations where traditional ground transportation may be hindered by natural obstacles like mountains, rivers, or dense forests. Helicopters provide a tactical edge by allowing forces to be deployed quickly and effectively, bypassing potential threats or environmental barriers that could impede ground units.

This accessibility enables military forces to engage in operations in far-flung locations that may otherwise be logistically challenging, ensuring timely support for troops or the ability to initiate surprise attacks seamlessly. In contrast, the other options highlight limitations or misconceptions regarding helicopter operations, such as their lack of operational flexibility at night or the need for careful planning prior to missions. Thus, the ability to operate in varied terrains truly underscores the effectiveness of helicopters in air assaults.