Which flight levels define the UIR (Upper Information Region) in the UAE?

The Upper Information Region (UIR) is a concept defined in airspace management, particularly in relation to air traffic services. In the context of the UAE, the UIR is designated as starting at Flight Level 600 (FL600) and extending upwards to an unspecified altitude, which effectively encompasses high-altitude flight levels commonly used by commercial jet aircraft.

Choosing FL600 as the lower boundary of the UIR is significant because this altitude is typically where aircraft operate above the majority of en-route traffic and below the stratified airspace where different regulations may apply. It allows for more efficient management of high-altitude flights, especially over large expanses like the Arabian Peninsula.

This allocation is crucial for flight safety, navigation, and coordination of air traffic, as it reduces the risk of conflict among aircraft with varying operational requirements and speeds. It leads to clearer separation between the UIR and lower airspace regions, helping air traffic controllers manage operations within each region effectively.

The other provided options do not align with the established flight levels defined for the UIR in the UAE. Their ranges do not correspond to the upper levels necessary for effective high-altitude air traffic management, making FL600 as the threshold for the UIR the appropriate choice.