What is required for low-close in obstacle avoidance?

The requirement for low-close in obstacle avoidance focuses on the necessity for a climb gradient that exceeds a standard rate for a limited distance. When approaching an area with potential obstacles, it is vital to ensure that the aircraft has the capability to climb sufficiently after takeoff to avoid these obstacles effectively. A climb gradient greater than 200 feet per nautical mile enables the aircraft to ascend rapidly enough to clear any immediate obstacles, ensuring safety and compliance with regulatory requirements.

Choosing to focus on a short distance acknowledges that while immediate clearance is essential, it's also important to contextualize this within the entire climb performance of the aircraft. This means that while the requirement specifies a temporary boost in climb capability, it does not need to be sustained for long distances, aligning with operational flexibility during flight planning and execution.