What is the visibility requirement for flying special VFR in Class D airspace?

For flying under Special Visual Flight Rules (SVFR) in Class D airspace, the visibility requirement is set at 1 statute mile (SM). This allows pilots to operate in weather conditions that may not meet standard visual flight rules but still maintains a minimum level of visibility for safe navigation and separation from other aircraft. By requiring only 1 SM of visibility in Class D airspace, it provides pilots with the flexibility to conduct operations in less-than-ideal conditions, such as when they are approaching or departing from an airport amidst variable weather.

This regulation is essential for maintaining safety since it encourages pilots to remain within visual reference of both the ground and other aircraft, reducing the risk of accidents while allowing operations with limited visibility. The other answers reflect higher visibility requirements that would not be permissible under SVFR conditions in Class D airspace.