What is the minimum flight visibility below 1,000 ft AGL during the night in uncontrolled airspace?

In uncontrolled airspace at night, the regulations specify that the minimum flight visibility must be at least 3 statute miles if an aircraft is flying below 1,000 feet AGL (Above Ground Level). This requirement is outlined in the Federal Aviation Administration (FAA) regulations to ensure that pilots can maintain adequate visual reference for safe operations. The reason for this particular visibility requirement is tied to the challenges of navigation and obstacle avoidance in low-light conditions, where depth perception can be compromised and patterns of light are not as easily discernible.

In daytime operations, the minimum visibility requirements may be different due to ample natural light, which enhances a pilot's ability to see and identify depth and distance. However, at night, the increased visibility requirement helps mitigate risks associated with reduced visibility and increases the safety parameters for flying in less favorable conditions. This is why 3 miles is established as a standard minimum for night operations in uncontrolled airspace below 1,000 feet AGL.