What is the two minute rule in aviation separation?

The two-minute rule in aviation separation refers to the requirement that aircraft must diverge by 45 degrees or more within 5 minutes to maintain adequate separation. This concept is crucial in preventing potential conflicts between aircraft, particularly during phases of flight where they may be ascending or descending. The rationale behind this rule is to ensure that, if aircraft are on converging paths, they will have sufficiently diverged within a defined timeframe, reducing the risk of collision.

This rule plays a vital role in air traffic management, particularly when establishing lateral separation. By ensuring the angles of divergence are significant enough (45 degrees or more), controllers can feel confident that aircraft will not only separate visually but also by distance, thus enhancing safety in controlled airspace.