The International Airways Volcano Watch (IAVW)

This paper discusses the International Airways Volcano Watch (IAVW), which is defined as, "International arrangements for monitoring and providing warnings to aircraft of volcanic ash in the atmosphere." The paper presents historical background, discusses operation of the IAVW, describes effects of recent volcanic eruptions, relates specific problems to be addressed, suggests guidance material to aid States and other users, and discusses future developments for the IAVW.