What is the maximum extension allowed for base and final legs in modified traffic patterns?

In modified traffic patterns, the maximum extension for both the base and final legs is not allowed. This is critical for maintaining safe and efficient aircraft operations, as these extensions could lead to increased risks of mid-air collisions or miscommunication with other aircraft in the traffic pattern, especially in busy airspace. Adhering to standard leg lengths ensures predictable behavior and spacing between helicopters and other aircraft, facilitating a smooth flow of operations around the landing site.

The limitations on extending these legs also help pilots remain aware of their position relative to the landing zone and surrounding obstacles. Therefore, keeping base and final legs within standard profiles is essential for maintaining safety and operational integrity in helicopter operations.