What should be the basis for making handoffs?

Making handoffs should primarily be based on the computer assigned code. This approach ensures that the aircraft is properly identified and tracked through standardized systems that facilitate accurate communication between different air traffic control sectors. The computer assigned code, often referred to as a transponder code, is crucial for maintaining situational awareness and ensuring that all parties involved in the air traffic management process have the most accurate, real-time information about the aircraft’s position and altitude.

Relying on the computer assigned code helps in managing the flow of incoming and outgoing traffic efficiently and enhances safety by minimizing the chances of miscommunication or errors that could arise from less reliable methods. It standardizes the process of handoff, reducing variability and improving overall airspace management.

While the pilot's request, manually assigned codes, and default radar frequency can play roles in operational procedures, they do not offer the same level of reliability or efficiency as the computer assigned code, which is specifically designed to support the dynamics of air traffic control.