Final answer:
The LDG ELEV selector in AUTO position automatically regulates cabin pressure in an aircraft based on the destination airport's elevation to ensure passenger comfort and safety.
Step-by-step explanation:
The LDG ELEV selector in the AUTO position is typically found in the cockpit of an aircraft. When it is set to AUTO, the landing elevation selector allows the aircraft's pressurization system to automatically regulate the cabin pressure during descent, ensuring passenger comfort and safety by managing the rate of change in the cabin altitude to match the aircraft's descent profile. The system uses the destination airport's elevation to calculate the necessary cabin altitude during the approach and landing. In AUTO mode, pilots are relieved from having to manually set the landing elevation, which is particularly useful during flights with multiple leg destinations or when workload in the cockpit is high.