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Description / Abstract:
Introduction
This document is the minimum operational, safety, and performance requirements (SPR) and interoperability requirements (INTEROP) for Enhanced Flight Vision System (EFVS) associated with recommended takeoff minima.
Takeoff minima are established for the use of vision systems technologies, treated as subsystems, which together with other subsystems including navigational aids and airport lighting and markings, are used to accomplish the operational goal, achieve levels of reliability, availability, and integrity appropriate to the intended function and phase of flight. These levels are consistent with other systems and subsystems used for the same intended function and phase of flight.
Safety, performance, and interoperability requirements are derived from examination of the operation and the associated performance and safety analyses. The operation is outlined in the Operational Services and Environment Definition (OSED) in Appendix A. The Operational Performance Assessment (OPA) for this operation is established in Appendix B. Finally, the Operational Safety Assessment (OSA) is presented in Appendix C which analyzes the operational safety by considering potential hazards to which the flight crew and/or aircraft might be exposed during the EFVS takeoff operation and derives requirements in order to control the likelihood of the hazards and their effects. The assessment criteria are derived in whole or in part from applicable, existing guidance material which identifies airworthiness approval guidance for airborne systems used during a takeoff in low visibility weather conditions.
All material in this document was developed jointly by EUROCAE Working Group 79 (WG79) and RTCA Special Committee-213 (SC-213).
The requirements specified in this document are necessary to provide adequate assurance that the aircraft systems and other systems, when operating together, will perform their intended function – EFVS Takeoff – in an acceptably safe manner for the operations defined in the OSED. The system here includes the interaction and interoperability with ground and air navigation service provider elements.