What phraseology is used to request an altitude report from a pilot?

The phraseology used to request an altitude report from a pilot is to ask them to "Report leaving/reaching/say altitude/say flight level." This option clearly communicates the specific information the controller needs from the pilot. By using this statement, the controller is not only asking for the altitude the aircraft is at, but also can specify whether they want the pilot to indicate when they are leaving one altitude or reaching another. This is essential for maintaining situational awareness and ensuring safe separation between aircraft, as well as monitoring compliance with air traffic control instructions.

This phraseology aligns with standard aviation communication protocols and emphasizes clarity, making it easier for pilots to understand exactly what the controller is requesting. Pilots are trained to understand and effectively respond to these requests, which enhances safety and efficiency in air traffic operations.