What equipment is required for aircraft operating in Class B airspace?

In Class B airspace, which includes the airspace around major airports where air traffic is typically the busiest, specific equipment is mandated to ensure safety and effective communication with air traffic control (ATC). Among the requirements, aircraft must have an ATC transponder with altitude reporting capabilities. This equipment allows for the identification of an aircraft on ATC radar screens and enables the monitoring of altitude, which is critical in a busy airspace environment. The transponder communicates the aircraft's position, altitude, and other information to ATC, ensuring safe separation from other aircraft.

While navigation lights and a first aid kit are important for general operational safety and emergency preparedness, they are not unique requirements for Class B airspace. Similarly, while a weather radar system can be beneficial for in-flight weather avoidance, it is not a regulatory requirement specifically for operating in Class B airspace. Therefore, the necessity of an ATC transponder and altitude reporting equipment stands out as the specific requirement for aircraft operating within this type of airspace.