ICAO 9718 VOL I PDF

INTRODUCTION

The radio frequency spectrum is a scarce natural resource with finite capacity limits and for which demand is constantly increasing. Predictions of future demand for spectrum indicate a continuing rate of increase for all users and radio services and facilities that utilize radio waves as the world economies progressively expand. The competition among all users for the spectrum available is hence expected to intensify in the years ahead. In this competitive situation, even a user holding a spectrum allocation will not have an automatic right to retain that radio frequency spectrum, as a decision by an International Telecommunication Union (ITU) conference may require that spectrum be removed from any radio service to meet a superior justified demand for other radio services. Aviation is only one of many such competitors, albeit with the significant benefit of a worldwide cooperative forum, namely the International Civil Aviation Organization (ICAO), to coordinate and support its case.