What should a pilot do to acknowledge a landing clearance at a controlled airport?

A pilot should acknowledge a landing clearance by transmitting the aircraft call sign. This action confirms that the pilot has received and understood the clearance given by air traffic control, ensuring smooth communication and coordination during landing operations. This practice is vital for maintaining safety and situational awareness within the controlled airspace.

When the pilot transmits the aircraft call sign, it provides air traffic control with confirmation that the pilot is prepared to comply with the landing instructions. This exchange is a crucial part of the communication process in aviation, reinforcing the importance of clear and concise acknowledgments in air traffic management.

The other actions mentioned, while important in their respective contexts, are not the correct method for acknowledging a landing clearance. For example, contacting air traffic control can be a general procedure, but it does not specifically acknowledge the clearance. Verifying wind conditions is a step in preparing for landing but does not serve as an acknowledgment. Similarly, beginning descent immediately could lead to safety concerns if done without proper acknowledgment of the clearance, as the pilot needs to confirm their understanding of the instructions first.