AIRBORNE WAKE VORTEX SAFETY SYSTEMS

Standard:
Scope:

This document recommends criteria for Airborne Wake Vortex Information Systems, including operational objectives, characteristics, and functional requirements. The recommendations in this document apply to transport aircraft, and describe the operational objectives of wake vortex information systems, situational displays, guidance systems, and avoidance/detection systems.

Rationale:

The task of ensuring vortex flight safety is a problem in which human factors play a major role. This means that it is possible that many irregular situations related to violations of the wake vortex separation minima could arise when the generation of crew warnings and avoidance recommendations requires taking into account the current spatial locations of the wake vortex and the follower airplane, as well as the dynamic of how those locations are changing. No single system based on calculating only the safe separation intervals is capable of effectively meeting the challenge of wake vortex safety under such conditions. Therefore, to ensure wake vortex safety under such conditions, there needs to be airborne wake vortex information system with corresponding human machine interface. Currently a range of airborne wake vortex safety system (WVSS) is being developed within the programs developing next generation air navigation systems as NextGen, SESAR, and the Russian State Program. Under these projects the wake vortex information is proposed to be introduced in the cockpit in a variety of forms. Guidelines for the standardization of this information are needed to ensure the appropriate display of wake vortex information in the cockpit to adequately address issues of workload, situation awareness, training, and information management.

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