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In the past few years Finland has replaced all of its conventional VHF omnidirectional radio range (VOR) stations with Doppler VORs. As part of its modernization of air navigation services, the Civil…

An artist's depiction presents an orbital view of satellites of the SARSAT (top) and COSPAS systems. Designed to pinpoint the source of distress signals emitted by emergency locator beacons, the…

An artist's depiction presents an orbital view of satellites of the SARSAT (top) and COSPAS systems. Designed to pinpoint the source of distress signals emitted by emergency locator beacons, the…

An artist's depiction presents an orbital view of satellites of the SARSAT (top) and COSPAS systems. Designed to pinpoint the source of distress signals emitted by emergency locator beacons, the…

Delegations from most of the Contracting States of ICAO and from observing organizations gathered at ICAO Headquarters in Montreal for the recent 29th Assembly. Symbolic of ICAO's role in the…

Delegations from most of the Contracting States of ICAO and from observing organizations gathered at ICAO Headquarters in Montreal for the recent 29th Assembly. Symbolic of ICAO's role in the…

Delegations from most of the Contracting States of ICAO and from observing organizations gathered at ICAO Headquarters in Montreal for the recent 29th Assembly. Symbolic of ICAO's role in the…

Mount Pinatubo in the Philippines is shown smouldering in late June 1991 in this photograph taken by the U.S. Geological Survey. Although predicting the dispersion of volcanic ash doud and other…

Mount Pinatubo in the Philippines is shown smouldering in late June 1991 in this photograph taken by the U.S. Geological Survey. Although predicting the dispersion of volcanic ash doud and other…

Mount Pinatubo in the Philippines is shown smouldering in late June 1991 in this photograph taken by the U.S. Geological Survey. Although predicting the dispersion of volcanic ash doud and other…