EVS Operational Rules1 Enhanced Vision Systems Terry Neale & Alex Hartland UK CAA
EVS Operational Rules2 Introduction What is EVS Background Evaluation Rule change proposal
EVS Operational Rules3 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 image of 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 Rules4 Live conformal image displayed on the Head Up Display (HUD) combiner The System Nose-mounted infrared camera Image-processing software algorithms
EVS Operational Rules5 Enhanced Vision Systems certified on Bombardier and Gulfstream aircraftEnhanced Vision Systems certified on Bombardier and Gulfstream aircraft Work at advanced stage for Dassault aircraftWork at advanced stage for Dassault aircraft Programmes in place for larger aircraftProgrammes in place for larger aircraft Published FAA airworthiness and operational regulationsPublished FAA airworthiness and operational regulations On the work programme of the ICAO Operations PanelOn the work programme of the ICAO Operations Panel Need for rule material!Need for rule material! Background
EVS Operational Rules11 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 Rules12 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 Rules13 The Proposed Rule (1)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 Rules14 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 Rules15 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: or for EVS approaches may be carried out in accordance with a method acceptable to the Authority1.430(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 Rules17 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 Rules18 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 Rules19 ACJ – Need for Qualifying Equipment Qualifying EVS equipment 3.1An 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 Rules20 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, 3.2For operations in RVRs below 550m two- pilot operation will be required.
EVS Operational Rules21 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 Rules22 Any questions? Terry Neale UK CAA – GV JOEB Chairman