What does 'mile-in-trail' mean for aircraft separation?

Mile-in-trail refers to a specific separation requirement where one aircraft must maintain a separation of at least one mile behind another aircraft during its approach or landing. This term is crucial in air traffic control, as it helps ensure safety and efficiency in managing aircraft movements, particularly during busy traffic periods.

When 'mile-in-trail' is employed, it allows controllers to optimize spacing between aircraft, thereby preventing wake turbulence and other potential hazards that can occur if aircraft are too closely spaced. This procedural separation is especially important in maintaining safe procedures as aircraft decelerate for landing, as the effects of wakes become more pronounced at lower altitudes.

Understanding this term is vital for comprehending air traffic control operations and ensuring that you grasp the importance of managing aircraft spacing effectively in the skies.