Air Traffic Skills Assessment (ATSA) Practice Test

When radar identification is made by position correlation, the critical information that ensures the identification and tracking of an aircraft focuses primarily on altitude information and positional data. Position correlation relies on matching the radar target with the known position of the aircraft, making the positional information crucial for maintaining accurate tracking.

In this context, while altitude information is significant for safety and separation, flight plan details and weather updates are not essential specifically for correlation. The flight plan might provide additional context about the aircraft's expected route and intentions, but it is not necessary for the immediate process of establishing radar identification through position correlation. Similarly, weather updates can be useful for overall situational awareness, yet they do not directly impact the necessity of position correlation for identifying an aircraft's location.

Thus, the correct choice reflects that position information is inherently part of the foundation for establishing identification through correlation, making it an integral and expected component in this process.