What minimum visibility is required for VFR flight in controlled airspace?

For VFR (Visual Flight Rules) flight in controlled airspace, the minimum visibility requirement is indeed 3 statute miles. This regulation is designed to ensure that pilots have sufficient visual reference to navigate and avoid other aircraft, as well as to maintain situational awareness.

In controlled airspace, particularly at lower altitudes and near airports, it is essential that pilots be able to clearly see and avoid other aircraft, obstacles, and the ground. The 3 statute miles of visibility ensures that pilots can maintain an adequate lookout while flying under VFR conditions, facilitating safe separation from other air traffic.

Other visibility requirements exist for different classes of airspace and may vary based on specific conditions, but 3 statute miles is the recognized minimum for VFR operations in controlled airspace as outlined by the FAA regulations, making it the correct answer in this context.