What does a pilot typically do when entering controlled airspace?

When entering controlled airspace, a pilot is required to request clearance before entering. Controlled airspace is designated airspace where air traffic control (ATC) has authority over the aircraft operations in that area, primarily to ensure safe separation between aircraft. By requesting clearance, the pilot communicates their intentions to ATC, receives guidance regarding airspace use, and is instructed on the correct altitude and route to follow. This process enhances safety and allows ATC to manage traffic effectively within the airspace, maintaining efficient flow and preventing potential conflicts between different aircraft.

The other options either suggest disregarding ATC procedures or imply a lack of communication, which would violate regulations and could lead to safety hazards in busy airspace. Therefore, it is essential for pilots to adhere to the requirement of obtaining clearance before entering controlled airspace.