What altitudes apply to an aircraft in a mountainous region classified as area 2, 3, or 4?

In mountainous regions classified as area 2, 3, or 4, the applicable altitude for an aircraft is 1,500 feet above the highest obstacle. This safety standard takes into account the rugged terrain and potential obstacles that are commonly encountered in these mountainous areas.

The specified altitude provides an adequate buffer above obstacles, which is crucial for maintaining a safe flight path and allows for maneuvering space in the event of unanticipated situations such as turbulence or sudden changes in weather. This requirement is designed to ensure that aircraft have sufficient clearance above the highest terrain features, supporting the safety of flight operations in these challenging environments.

Understanding this altitude requirement is essential for pilots to ensure compliance with regulations and to enhance safety during flight operations in mountainous regions.