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RCED-96-74R 1 (1996-02-06)

handle is hein.gao/gaobaclbi0001 and id is 1 raw text is: 


             United States
GAO          General Accounting Office
             Washington, D.C. 20548

             Resources, Community, and
             Economic Development Division


             B-271044


             February 6, 1996


             The Honorable John J. Duncan
             Chairman
             Subcommittee on Aviation
             Committee on Transportation
               and Infrastructure
             House of Representatives

             The Honorable William J. Lipinski
             Ranking Democratic Member
             Subcommittee on Aviation
             Committee on Transportation
               and Infrastructure
             House of Representatives

             On June 8, 1995, we testified at your subcommittee's hearing
             to discuss our May 1995 report entitled, National Airspace
             System: Comprehensive Plan for Global Positioning System is
             Needed (GAO/RCED-95-26, May 10, 1995). On November 30,
             1995, your subcommittee held a second hearing on the Federal
             Aviation Administration's (FAA) efforts to augment the
             Department of Defense's (DOD) Global Positioning System
             (GPS). At that hearing, attention focused on the FAA's wide
             and local area augmentation systems, which will enable
             aircraft to use GPS for civil air navigation in all phases
             of flight. DOD, FAA, Wilcox Electronics, Inc.--FAA's
             contractor for the wide area augmentation system (WAAS)--and
             the Air Transport Association presented testimonies. As
             requested by your offices, we attended the second GPS
             hearing and analyzed the witnesses' statements so we could
             provide you our views on the statements for the hearing
             record. This letter transmits the results of our analysis.

             In summary, we have three major comments. First, FAA will
             not be able to meet its 1997 milestones regarding the use of
             GPS, augmented by the WAAS, as a primary means of civil air
             navigation in domestic airspace. As a result, the agency
             recently pushed back these milestones to mid-1998. We
             remain concerned about schedule slippage because the revised
             schedule still provides a tight timeframe for developing the
             WAAS and potential difficulties could affect the system's


GAO/RCED-96-74R, Global Positioning System Augmentations

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