A METHOD AND AN ON-BOARD SYSTEM FOR ENSURING THE MINIMUM LONGITUDINAL SEPARATION DISTANCE UNDER WAKE TURBULENCE CONDITIONS

?With the aid of the proposed method and on-board system, standardized distance minima for longitudinal separation is ensured during flight of a second aircraft (3) behind a first aircraft (1) on take-off or landing of said aircraft on one runway or on two parallel runways located near to each other, or during flight one behind the other at near altitude levels in conditions where there is the risk of turbulence from the vortex wake of the first aircraft possibly being present along the direction of movement of the second aircraft, wherein, according to the invention, continuous monitoring of the level of wake vortex flight safety of the second aircraft (3) is carried out in a buffer zone (6) which surrounds said aircraft and is selected on the basis of the direction of the aircraft (3) outside the standardized distance minimum, taking into account pilot reaction time and the time for the system for controlling the second aircraft to respond to a command to change the speed of movement of the aircraft, and, in a situation in which the level of wake vortex safety is reduced, a command is supplied to change the speed of the second aircraft to ensure that the aircraft flies at distances greater than the standardized minimum separation distance (5) and less than the calculated maximum distance (8) recommended between aircraft, with the pilot being presented with the option of independently changing the speed of the aircraft by braking or accelerating during the continuous monitoring of the implementation of standardized requirements regarding longitudinal separation, without a reduction in wake vortex safety.