What is required for position correlation during Primary Radar Identification?

For position correlation during Primary Radar Identification, the requirement is to establish the aircraft's location in relation to known points in the environment, specifically through range and azimuth from a permanent fix. This method enables air traffic controllers to accurately determine the aircraft's position on the radar display.

Range refers to the distance of the aircraft from the radar installation, while azimuth indicates the angle or direction from the radar to the aircraft. Together, these two parameters provide a precise geographical context for the identified target, making it possible to correlate the radar return with the aircraft's actual position. This is essential in ensuring safe aircraft separation and in managing air traffic effectively.

In contrast, knowing the exact altitude of the aircraft is essential for vertical separation but does not aid in horizontal position correlation. Flight time from departure may provide some context for the aircraft's route but is not directly related to real-time position determination. Similarly, while the position of other nearby aircraft is important for maintaining separation, it does not directly contribute to correlating a specific target's position relative to permanent fixes. Thus, range and azimuth from a permanent fix is the required information for effective position correlation during Primary Radar Identification.