What altitude does the outer ring of Class C airspace reach?

The outer ring of Class C airspace typically extends from the surface to a specified upper limit, which is usually expressed in feet above ground level (AGL). In the case of the outer ring of Class C airspace, it generally reaches up to 4,000 feet AGL. This structure allows for a manageable vertical limit for aircraft operating within or on the periphery of Class C airspace, ensuring that adequate separation is maintained between different categories of airspace users.

The specified altitude ensures that aircraft entering or operating within Class C airspace can efficiently manage their transitions while safeguarding safety and maintaining an organized flow of air traffic. Class C airspace starts at the surface and extends upward, with its outer ring serving as a buffer zone to facilitate controlled approach and departure procedures without overwhelming air traffic control.

The other options provided reflect common misunderstandings about Class C airspace limits. Understanding these specifics helps pilots navigate effectively within various classes of airspace and adhere to air traffic management protocols.