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Enhanced Vision Systems

Enhanced Vision Systems. Terry Neale & Alex Hartland UK CAA. Introduction. What is EVS Background Evaluation Rule change proposal. What Is a Enhanced Vision System?. Proposed JAA Definition

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Enhanced Vision Systems

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  1. Enhanced Vision Systems Terry Neale & Alex Hartland UK CAA EVS Operational Rules

  2. Introduction • What is EVS • Background • Evaluation • Rule change proposal EVS Operational Rules

  3. What Is a Enhanced Vision System? • Proposed JAA Definition • Enhanced Vision System (EVS).An aeroplane system which uses sensing technology to provide a real time imageof the outside world, displayed to the pilot on either a HUD or head- down display. It includes all sensors, computers, power supplies, display systems, indicators and controls. EVS Operational Rules

  4. The System • Nose-mounted infrared camera • Image-processing software algorithms • Live conformal image displayed on the Head Up Display (HUD) combiner EVS Operational Rules

  5. Background • Enhanced Vision Systems certified on Bombardier and Gulfstream aircraft • Work at advanced stage for Dassault aircraft • Programmes in place for larger aircraft • Published FAA airworthiness and operational regulations • On the work programme of the ICAO Operations Panel • Need for rule material! EVS Operational Rules

  6. Flight Evaluations • FAA Proof of Concept (Gulfstream aircraft) • FAA Certification projects (Gulfstream/Bombardier) • Transport Canada Certification (Bombardier) • JAA Certification projects (Gulfstream/Bombardier) • JAA JOEB Evaluations (Gulfstream/Bombardier) • JAA AWOSG Demonstrations (5 members) (Gulfstream) EVS Operational Rules

  7. Weather Conditions Evaluated by JAA • Low cloud • Advection Fog (RVR 300-1000 metres) • Radiation Fog (RVR 300-1000 metres) • Night VMC approaches in mountainous terrain • Snow Showers EVS Operational Rules

  8. EVS Operational Rules

  9. EVS Operational Rules

  10. EVS Operational Rules

  11. Conclusions for Infra Red Based EVS • No significant benefit in RVRs less than 300 metres and solid cloud • Benefit can be very variable depending on type of fog on the day • Good benefit in night VMC operations particularly in hazardous terrain • Benefits in taxi operations at night and in low visibilities EVS Operational Rules

  12. Rationale for Rule Development • Fit within current JAA operational regulations • Harmonised as much as possible with FAA • Give a benefit appropriate to the equipment performance • Cater for the variability of EVS performance • Anticipate the risks associated with new technologies prior to wide scale operational experience • Acknowledge the overall benefit in all operating phases of fitting this equipment. EVS Operational Rules

  13. The Proposed Rule • A pilot using an enhanced vision systems certificated for the purpose of this paragraph may: (i) Continue an approach below DA(H) or MDA(H) to 100 feet above the threshold elevation of the runway provided that he has at least one of the following visual references displayed on the enhanced vision system: EVS Operational Rules

  14. The Proposed Rule (A) Elements of the approach lighting; or (B) The runway threshold, identified by at least one of the following: the beginning of the runway landing surface, the threshold lights, the threshold identification lights; and (C) The touchdown zone, identified by at least one of the following: the runway touchdown zone landing surface, the touchdown zone lights, the touchdown zone markings or the runway lights. EVS Operational Rules

  15. The Proposed Rule • (ii) Reduce the calculated RVR for the approach from the value in column 1 of table 9 below to the value in column 2: • 1.430(a)(2) Notwithstanding paragraph (a)(1) above, in-flight calculation of minima for use at unplanned alternate aerodromes and/or for EVS approaches may be carried out in accordance with a method acceptable to the Authority. EVS Operational Rules

  16. RVR Credit Table (extracts)

  17. The Proposed Rule (2) Paragraph (h)(1) above may only be used for ILS, MLS, GLS, and PAR approaches with a DA(H) no lower than 200 feet or an approach flown using certified vertical flight path guidance to a MDA(H) or DA(H) no lower than 250 feet. EVS Operational Rules

  18. The Proposed Rule (3) A pilot may not continue an approach below 100 feet above runway threshold elevation for the intended runway, unless at least one of the visual references specified below is distinctly visible and identifiable to the pilot without reliance on the enhanced visual system: (A) The lights or markings of the threshold; or (B) The lights or markings of the touchdown zone. EVS Operational Rules

  19. ACJ – Need for Qualifying Equipment • Qualifying EVS equipment • 3.1 An enhanced vision system certificated for the purpose of Appendix 1 to JAR-OPS 1.403(h) will typically have: • (i) A head up display system (capable of displaying, airspeed, vertical speed, aircraft attitude, heading, altitude, command guidance as appropriate for the approach to be flown, path deviation indications, flight path vector, flight path angle reference cue and the EVS imagery), EVS Operational Rules

  20. ACJ • (ii) A radio altimeter system, • (iii) For two pilot operation, a head-down view of the EVS image, or other means of displaying the EVS-derived information easily to the pilot monitoring the progress of the approach, • 3.2 For operations in RVRs below 550m two-pilot operation will be required. EVS Operational Rules

  21. Summary • EVS is here and will only get better • Other regulators have responded to the requirement for a rule change • Demand from industry and manufacturers is high • A lot of work has already been done • Draft rule change has been published • Certification and Ops coordination needed! EVS Operational Rules

  22. Any questions? Terry Neale UK CAA – GV JOEB Chairman EVS Operational Rules

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