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MASAD-82-28 1 (1982-04-02)

handle is hein.gao/gaobabdbw0001 and id is 1 raw text is: UNITED STATES GENERAL ACCOUNTING OFFICE WASHINGTON, D.C. 20548 MISSION ANALYSIS AND SYSTEMS ACQUISITION DIVISION B-206851 APRIL 2,1982 The Honorable Caspar W. Weinberger The Secretary of Defense Attention: Director, GAO Affairs 117982 Dear Mr. Secretary: Subject: Need to Reexamine JTIDS Requirements and Architecture (MASAD-82-28) In light of the Office of the Secretary of Defense planned March 31 antijam (AJ) workshop followup meeting to review proposed service AJ communications architectures, we would like to inform you of several potential issues which we identified during the course of our survey of the Department of Defense's development of the Joint Tactical Information Distribution System (JTIDS) class 2 terminal. We believe these issues require your immediate attention. Specifically: --The utility and cost effectiveness of JTIDS class 2 terminals may be questionable since the Air Force and the Navy have continued to reduce their total number of class 2 terminals planned for procurement until only a fraction of U.S. forces will be JTIDS equipped. Serv- ice requirements for JTIDS still have not been firmly established, which was also noted in our previous JTIDS report, The Joint Tactical Information Distribution System--How Important Is It? (PSAD-80-22, Jan. 30, 1980). --With Office of the Secretary of Defense approval in 1980, the Air Force and the Navy are continuing to develop JTIDS using two different technologies, Time Division Multiple Access and Distributed Time Division Multiple Access, respectively. We are concerned that the use of two different technologies with the associ- ated increased development costs and interoperability problems may not be appropriate. We understand that the Navy's Distributed Time Division Multiple Access has greater capacity growth potential which would appear to be desirable for the Air Force as well. (954021)

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