Cabin altitude

Cabin altitude refers to the effective altitude or atmospheric pressure inside an airplane's cabin, which is controlled to ensure passenger comfort and safety during flight. Although the aircraft may fly at high altitudes (around 30,000 to 40,000 feet), the cabin environment is pressurized to simulate lower altitudes, typically equivalent to about 6,000 to 8,000 feet above sea level. This controlled environment helps prevent altitude sickness and makes breathing easier for passengers and crew. Monitoring cabin altitude is crucial, as excessive pressure changes can indicate issues with the aircraft's pressurization system.