Section 1. General


Class C airspace areas are designed to improve aviation safety by reducing the risk of midair collisions in the terminal area and enhance the management of air traffic operations therein. Aircraft operating in these airspace areas are subject to certain operating rules and equipment requirements.


Before initiating a Class C airspace proposal, determine if there are nonrulemaking alternatives that could resolve the operational issue(s). If nonrulemaking alternatives resolve the issue(s), no Class C rulemaking action is required.

  1. The Rules and Regulations Group is responsible for oversight of the Class C airspace designation/modification process and issuance of all Notices of Proposed Rulemaking (NPRM) and final rules. The Rules and Regulations Group will provide assistance, as needed, to the Service Centers in developing Class C airspace proposals.
  2. The Service Center is responsible for coordination to determine Class C airspace candidacy or the need for modifications to an existing area. All Class C airspace establishment or modification plans must be coordinated with the Rules and Regulations Group prior to any public announcement. The Service Center must perform an analysis of the Class C airspace candidate and document the analysis in a staff study. Preparation of the staff study may be delegated to the facility.
  1. Service Centers must biennially evaluate existing Class C airspace areas to determine if the area meets candidacy requirements, satisfies the intended purpose of reducing the potential for midair collision, and enhances the management of air traffic operations in the terminal area. Some suggested evaluation considerations include, but are not limited to:
  1. The Class C standards in this chapter;
  2. Airspace modeling results (PDARS, TARGETS, etc.);
  3. Traffic Alert Collision Avoidance System - Resolution Advisories;
  4. User feedback/controller input;
  5. Safety reports (ATSAP, ASRS, etc.);
  6. Significant changes in airport operations and/or terminal area traffic flows; and/or
  7. Airport runway configuration changes.
  1. If the evaluation indicates that airspace modifications should be made, Service Centers must follow the applicable procedures in this Order.