The ASHTAM provides information on the status of activity of a volcano when a change in its activity is, or is expected to be of operational significance. This information is provided using the volcano level of colour code. When volcanic eruption in progress or volcano dangerous, eruption likely, with ash plume/cloud is reported above FL 250 or is expected to rise above FL 250, the level of alert colour code is
Domanda 386, Air Law - ATPL - Airline Transport Pilot license