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Paper 94 -- Separation Minima Model: How Changes in Contributing Factors Could Affect Current Standards

In 1919, the International Commission for Air Navigation (ICAN) was created to develop “General Rules for Air Traffic”. In 1926, the US Air Commerce Act was passed calling for implementation of air traffic. Its first basic Separation Minima (SM) was “Do not take off until there is no risk of collision with landing aircraft and until preceding aircraft are clear of the airfield.”[1] Since then, many SM standards have been written based upon the technology available at the time and/or expert judgment. Leaps in technology since then require that the SM standards be updated. However, many SM have not been modified to reflect modern technological capabilities. In addition, many regions around the world have set different values for the same operational case or have used different criteria and context descriptions. As current traffic demand is expected to double by 2020, one of the ATM system challenges is to safely manage the expected increase of movements. Reducing SM becomes a potential part of achieving this challenge, always keeping in mind that SM reductions increase airspace capacity but should never reduce safety levels. A useful tool would allow quick comparative analysis to understand what affect changes in contributing factors would have on SM before investing in a Safety Case. To develop this model RESET, a SESAR aligned project which includes the FAA as a partner, has extracted information from several international regulations (ICAO, FAA, British, Australian, Canadian and Eurocontrol) classifying the descriptions of SM values by phase of flight, operational context, conditions, etc. also identifying aerodynamic factors, human factors, hazards/risks and equipment precision. The valuable results of this research are unprecedented in their contents and for the way in which they are presented. The identified contributing factors were then grouped into budgets and used as variables in the Separation Minima Model.
Theme: Separation
Keywords: ATM, Model, Regulations, Safety, Separation Minima
Posted by: Daniel MOSQUERA BENITEZ / Other authors: Alan Ross GROSKREUTZ, Lars FUCKE
Note: Unset Received On Jan 23, 2009

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