During operations outside controlled airspace at altitudes of more than 1200 ft AGL, but less than 10000 ft MSL, what is the minimum flight visibility for VFR flight at night?

When flying under Visual Flight Rules (VFR) at night outside controlled airspace and at altitudes between 1,200 feet AGL and 10,000 feet MSL, the regulations dictate a required minimum flight visibility of 3 statute miles. This requirement is established to ensure that pilots have sufficient visibility to see and avoid other aircraft and ground obstacles, which is especially critical during nighttime operations when visual references are limited.

Maintaining a minimum visibility of 3 miles allows pilots to better assess their surroundings and navigate safely. This rule is essential for minimizing the risk of mid-air collisions and ensuring that pilots can operate their aircraft effectively within a defined visual range, especially when natural light sources are absent or reduced after dark.

The other choices indicate lesser visibility requirements, which do not meet the safety standards set forth in aviation regulations for nighttime flight at the specified altitude range. These lower visibility figures would potentially increase the risks of encounters with obstacles and other aircraft, demonstrating the importance of understanding and adhering to the specific requirements for safe VFR operations at night.