What minimum flight visibility is required for VFR flight operations on an airway below 10000 ft MSL?

The minimum flight visibility required for VFR (Visual Flight Rules) operations on an airway below 10,000 feet MSL (Mean Sea Level) is indeed 3 miles. This regulation is established to ensure that pilots have sufficient visual reference to navigate and maintain separation from other aircraft in controlled airspace and that they can adequately assess weather conditions.

Maintaining at least 3 miles of visibility allows pilots to detect and avoid other aircraft, as well as respond effectively to changing weather conditions. This minimum visibility requirement is essential for safety, as it helps to mitigate risks associated with reduced visibility environments, such as cloud cover or precipitation, which can obscure visual cues needed for navigation and collision avoidance.

In contrast, if the visibility were to be lower than 3 miles, it would potentially compromise the pilot's ability to safely conduct VFR operations, hence the regulation mandates maintaining this threshold to uphold the safety of all air traffic operations in the airspace.