What is the minimum descent altitude for a pilot interfacing with a STAR?

The minimum descent altitude for a pilot interfacing with a Standard Terminal Arrival Route (STAR) is predetermined based on the specific STAR. Each STAR has designated altitudes that must be adhered to for safety and to ensure proper spacing and sequencing of aircraft as they approach an airport. These altitudes take into account various factors, including terrain, airspace classifications, and the arrival traffic flow.

The predetermined minimum altitude helps to establish clear expectations for the pilot, aligning with air traffic control directives and ensuring compliance with published procedures. This structure is essential for maintaining safe vertical separation from other aircraft and obstacles, contributing to a safer and more orderly airspace system during the critical phases of approach and landing.