ENIWETCK INSTRUMENTATION PLAN 1.0 Introduction 1.1 Impact in the Marshall Islands area of the Pacific is a requirement of present and future missile programs on the Air Force Western Test Range. In the Marshall Islands area, two impact areas are presently being utilized, the Kwajalein Atoll and the Eniwetok Atoll. 1.2 The Kwajalein Atoll was instrumented to support the development of an anti-missile missile system (Nike Zeus & Nike-X), and to support project PRESS. At the present time, the Kwajalein Complex does not have a recovery capability. Furthermore, impacts into the Kwajalein area places a stringent range safety requirement on the AFWTR due to the overflight of native populated islands. 1.3 The present capability at Eniwetok are scoring, recovery, and terminal trajectory optical coverage. For impacts into the Eniwetok Atoll, the range safety requirement is less stringent than for impacts into the Kwajalein area, 1.4 Future programs are requiring terminal area instrumentation which does not presently exist. The Advanced Minuteman Program is scheduled to impact into the Lniwetok Lagoon and requires stringent terminal instrumentation coverage, scoring, and recovery. Therefore, it is required to instrument the kniwetok Atoll to meet present and future program requirements. Also, this instrumentation complex can support other programs due to the overloaded impact schedule for the Kwajalein area, and due to the range safety advantages of impacts into the Eniwetok area. 1.5 This report discusses the site location, problem areas, program re- quirement, and instrumentation systems to satisfy the requirements, -t-