Turbojets operating at and below what altitude require individual coordination as per ZAE/JAN LOA?

Turbojets operating at and below 10,000 feet require individual coordination according to the ZAE/JAN Letter of Agreement (LOA). This altitude threshold is significant because it represents the transition between different airspace management protocols for high-performance aircraft like turbojets. At this altitude and below, the potential for increased traffic density and the performance characteristics of turbojets necessitate a more stringent level of coordination among air traffic controllers to ensure safe and efficient operations.

By requiring coordinated communication for turbojets in these lower altitudes, it allows controllers to closely monitor their flight paths and manage interactions with other aircraft, considering factors such as wake turbulence, airspeed, and the climb-out/descent profile of the turbojet. This unique requirement helps to mitigate risks associated with high-speed jet operations in more congested airspace.

Moreover, the designation of 10,000 feet as a critical altitude aligns with established practices in air traffic control, where different procedural rules often kick in around this level, enhancing safety measures.