Which of the following is a requirement for obtaining SVFR clearance?

To obtain a Special Visual Flight Rules (SVFR) clearance, it is essential to establish communication with air traffic control (ATC). This requirement ensures that the pilot can receive necessary instructions and information concerning the safety of operations in conditions where visibility is reduced. Through communication with ATC, pilots can obtain clearance to fly under visual flight rules within controlled airspace when visibility is less than the usual VFR minima, typically in congested airspace or near airports.

The process is grounded in situational awareness and safety management, enabling ATC to maintain a streamlined flow of traffic while helping pilots navigate through challenging conditions. By requiring communication, the procedure enhances overall safety for both the pilot seeking SVFR and other aircraft within the airspace.

The other choices do not accurately reflect the requirements for SVFR clearances. For instance, there is no requirement to request SVFR clearance at least 30 minutes before departure, and such clearance is not limited to nighttime operations only nor can it be obtained without prior notification.