What is the minimum equipment required for an aircraft in order for a pilot to request special VFR?

For a pilot to request Special VFR (SVFR) clearance, one essential requirement is that the aircraft must be equipped with two-way radiocommunication capability. This requirement ensures that the pilot can maintain communication with air traffic control (ATC) while operating under SVFR conditions.

The purpose of SVFR is to allow pilots to fly in weather conditions that are below standard visual flight rules (VFR) minimums while remaining in controlled airspace. Effective communication with ATC is critical during these operations to ensure safety and coordination, especially when navigating in and around potentially congested airspace where visibility may be limited.

The other options, while important for various aspects of flight operations, are not specifically mandated for requesting SVFR. A visual flight rules navigation system and flight data monitoring systems have their own applications but do not relate directly to the ability to communicate with ATC for SVFR clearance. Automatic dependent surveillance is an advanced tracking system used primarily for air traffic management and does not replace the requirement for two-way communication.