Which airspace class typically requires pilots to follow specific operational rules to ensure safety?

Class C airspace requires pilots to adhere to specific operational rules to enhance safety. This airspace is often found around busy airports and typically includes both a horizontal and vertical limit. To operate in Class C airspace, pilots must establish communication with air traffic control (ATC) before entering. Additionally, pilots must have a specific type of clearance, maintain two-way communication, and often need to transponder equipment that allows for altitude reporting. These requirements are designed to manage the higher density of air traffic and ensure safe separation between aircraft, making it critical for pilots to understand and follow the rules in this class of airspace.

The other airspace classes have their own sets of rules, but Class G is uncontrolled and has fewer restrictions, while Classes B and A have their operational requirements which focus on different aspects of reporting and communication.