What is the most preferred barrier type in terrain flight operations?

In terrain flight operations, the funnel type barrier is preferred because it effectively directs the flight path of the aircraft in a controlled manner. Funnels are designed to narrow the area in which an aircraft operates, guiding it through specific routes while minimizing the risk of encountering obstacles. This guidance is crucial during terrain flying, where visibility can be limited, and the landscape can be complex.

The funnel shape assists pilots by channeling flight paths; it creates a sense of spatial awareness, making it clearer where the aircraft should go. This can be particularly important in environments where terrain variations are significant and where navigating safely means avoiding potential hazards.

While other barrier types like walls, screens, and nets may serve specific purposes, they do not provide the same level of guidance and safety that funnels offer in dynamic environments. Walls can create abrupt barriers, screens may only obscure vision, and nets may lack the capability to channel movement effectively. The funnel approach, therefore, emerges as the most effective option for optimizing safety and precision in terrain flight operations.