I've also heard that all Boeing and Airbus aircraft are delivered with ADS-B installed. And that there's an effort to expand the Capstone I and Capstone II programs in Alaskastatewide. And finally, I've heard that about 10 years ago, the FAA was considering paying to equip all the airplanes in the country with ADS-B and eliminating the costly to build-and maintain-radar system. ADS-B, since it sends position information at least every second is much more accurate than radar that requires some 10 to 15 seconds to complete a sweep. According to one study, the cost savings alone would warrant the transition to ADS-B since one terminal radar with a 60-nautical-mile-surveillance radius costs as much as a network of at least 20 GBTs, each providing surveillance service up to 120 nautical miles, while providing equal or improved performance. Unlike conventional radar, ADS-B works at low altitudes and on the ground so that it can be used to monitor traffic on airport runways. When an airborne ADS-B target lands, its blue icon turns to brown to indicate it's on the ground. And ADS-B is effective in remote or mountainous areas where radar coverage is limited or nonexistent.