VAAC

AcronymDefinition
VAACVolcanic Ash Advisory Center
VAACValle Arriba Athletic Club (Venezuela)
VAACVolvo Ambient Air Cleaner (Volvo vehicles)
VAACVeterans Affairs Advisory Committee (Washington)
VAACVectored-thrust Aircraft Advanced Flight Control (active control technology research)
VAACViral Antigen-Antibody Complex
References in periodicals archive ?
Ces experts sont, en outre, en relation avec l'Institut des Sciences de la Terre islandais, les VAAC de Londres, de Toulouse et de Montreal, et l'Institut national de l'environnement industriel et des risques (INERIS).
Bonnardot, 2007: Comparison of VAAC atmospheric dispersion models using the 1 November 2004 Grimsvotn eruption.
Based on the VAAC forecast, the Civil Aviation Authority will then issue a NOTAM (Notice to Airmen) advising airspace users of the location of those medium and high density areas.
The country has been able to safely keep its airspace open by enhancing the VAAC data with operational expertise to more precisely determine safe fly zones, he added.
'We welcome the operational refinements made by the Volcanic Ash Advisory Centre (VAAC) in their theoretical model but we are still basically relying on one-dimensional information to make decisions on a four-dimensional problem.
We welcome the operational refinements made by the Volcanic Ash Advisory Centre (VAAC) in their theoretical model but we are still basically relying on one-dimensional information to make decisions on a four-dimensional problem," he added.The result, he said, is the unnecessary closure of airspace.Safety is always our number one priority.
"Current information from the Volcanic Ash Advice Centre (VAAC) suggests that a no-fly zone will have to be imposed over Ireland tomorrow that will affect Dublin, Shannon Galway, Sligo, Ireland West (Knock), Donegal, Cork and Kerry," said a spokesman.
"Beyond the potential for a major accident linked to engine failures, volcanic ash can be a considerable threat for other reasons," according to the Volcanic Ash Advisory Center (VAAC)
Last night, a spokesman said: "Current information from the Volcanic Ash Advice Centre (VAAC) suggests that a no-fly zone will have to be imposed over Ireland that will affect Dublin, Shannon Galway, Sligo, Ireland West (Knock), Donegal, Cork and Kerry.
The latest ash models show continuing ash over Europe according to the London VAAC and, for the first time, the potential of ash, although very minute and high, over Nova Scotia by Monday (potentially).
Britain's National Air Traffic Service (Nats) said a new ash cloud was spreading south and east towards the UK, while the European Volcanic Ash Advisory Centre (VAAC) said it may also hit Denmark and Scandinavia.
The Volcanic Ash Advisory Centre (VAAC), based at the Met Office in London, said the eruptions of Mount Eyjafjallajokull in Iceland had now diminished with only small amounts of ash being ejected up to 6,000 feet in the atmosphere.