162x Filetype PPT File size 0.14 MB Source: www.icao.int
IATA General Positions Operational Issues • Airspace should not be closed when contaminated by volcanic ash. • The decision to operate in areas affected by contaminated volcanic ash should be left to the airlines. IATA General Positions Administrative Issues • Develop and implement ICAO Region Contingency ATM Plans • IATA requires development of a progressive global standard in harmony with ICAO Annex’s but recognizes this may involve interim steps to allow for the implementation of individual regional technology or other capability advances Observed Ash - Reporting • VAAC Procedure for en route hazard reporting –Use one Lower threshold at conceptual visible ash of 2 mg/m3 • Met Office in METAR –For inclusion in a METAR, use a lower threshold at conceptual visible ash of 2 mg/m3; (exclude any reference to residual ash) VAAC Procedures • An agreed set of VAAC procedures should be drafted which will ensure consistency and performance measurements and support new standards for inclusion in Annex 3 • Metrics will be created for compliance of the above mentioned standard. VAAC Forecast Output Concentration Charts • The longer term goal is the production of accurate concentration charts with demonstrated accuracies acceptable to the industry. • In the meantime - immediately, label the concentration charts posted on the VAAC websites as “Experimental” until such time the evidence can validate their accuracy. • Change current concentration levels to two levels, 2 mg/m3 & 4 mg/m3 • Until such time a VAAC can demonstrate that it is capable of producing concentration charts to the accuracy level, or better, of the London / Toulouse VAACs, then other VAACs should not post concentration level charts on their website. • Until best practice performance measurements are available, London / Toulouse to present their current benchmark level of accuracy.
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