Is a mode C transponder required in Class B airspace?

A Mode C transponder is required within the Mode C veil, which is the airspace surrounding Class B airports typically extending from the surface up to 10,000 feet MSL. This requirement ensures that air traffic control can accurately track and manage the air traffic in and around busy airport environments, enhancing safety by providing situational awareness to both pilots and controllers.

In the context of Class B airspace, pilots must have a Mode C transponder operational when flying within this veil, as the transponder enables automatic reporting of altitude and facilitates the safe operation of aircraft in crowded airspace. This infrastructure allows for more efficient communication with air traffic control, contributing to overall airspace safety.

The other choices convey misconceptions about the transponder requirements. Operating without the necessary equipment can lead to serious safety issues and regulatory violations. Understanding the specific requirements related to Class B airspace helps ensure compliance and enhances the safety of flight operations.