New space-based navigation prompts opposition from some US airlines

Some big US airlines are questioning the benefits of proposed next-generation satellite navigation over oceanic routes, even as Russia is about to take a big step toward potentially embracing the concept. The ambivalence of American carriers about the anticipated services was on display at an industry meeting Friday, when a federally created advisory group launched a cost-benefit analysis of space-based aircraft surveillance slated to be provided in coming years by Aireon. The closely held venture is controlled by Iridium Communications and a number of European air-traffic control providers. It promises to help airlines save time and fuel by taking more direct routes or adjusting aircraft speed and altitude, all based on traffic and weather conditions. <br/>