Airspace is classified into three zones according to ash density

4/22/10, 10:38 AM

The Finnish Transport Safety Agency (Trafi) decided on 20 April to apply the model suggested by Eurocontrol and the European Commission to air traffic restrictions in Finland. The restrictions will be implemented by the air traffic and airport service provider, Finavia.

The airspace will be classified into three zones. Zone 1 is an area of high ash density where no flights are allowed. In zone 2, the ash density is low and flights may be allowed after safety assessment. Zone 3 is free of ash and there are no air traffic restrictions.

The restrictions apply to all flights with powered aircraft, excluding weight-shift controlled ultralight aeroplanes, powered parachutes, unmanned aircraft and other aircraft with a structural mass including fuel of no more than 70 kg as referred to in section 6(2) of the Finnish Aviation Act.

According to current forecasts, the ash plume will remain over southern Finland. This may restrict the use of airports. The airspace in the rest of Europe is mostly free of ash and flights are allowed.

Finavia implements the restrictions

Finavia will place or lift restrictions on the use of airspace and airports in accordance with the model. The forecasts cover the next 18 hours and are updated every six hours.

Finavia provides information on the situation to pilots and passengers every six hours. Finavia's releases are also published on Trafi's and its Aviation Sector's website.

Further information

VAAC's ash forecast