@ eee ot atel iAASi es AE EIN ety cele we eae wf PART Ii, CHAPTERS 1, 2 and 3 1.1 The HARDTACKtest series at EPG . was designed to achieve the following objectives which are Vital to the continued rogress_in research an evelopment of atomic To test-proof certain weapons in stockpile or to be stockpiled in the * wo a. @ oe oe @ AEC Staff Paper 952/19 (Test Activities for Calendar Year 1958) secured formal approval for Operation HARDTACK,which included the following atomic detonations: od & wv vw @v @ @ @ @ @ FIRM LABORATORY SHOTS oe @ 2.1 ORIGINAL CONCEPT 9 sponsored by UCRL—all on barges ws b. To continue developmental research. on promising weapons; c. To continue long-range weapons research of new techniques, ideas, and ' designs; and d. To conduct a weapons effects gram required by DOD. pre CHAPTER 2 TEST EVENTS 8 sponsored by LASL — 7 on barges; 1 on surface v7, near future; weapons and in the improvement of atomic deenise: vor F& w& rv =F CHAPTER 1 GENERAL OBJECTIVES 1 May 1957, SHOT EXPERIENCE 2.2 The following is a summary of shots actually detonated at EPG during Operation HARDTACK (Operational phase 15 March 1958 — 15 September 1958): LABORATORY DIAGNOSTIC SHOTS LASL sponsored 13 barge shots, of which one was a one-point safety shot. CONTINGENCY LABORATORY SHOTS LASL sponsored 2 ground shots. 3 sponsored by LASL — 2 on barges; 1 in shallow water or in a barge UCRL sponsored 13 barge shots. UCRLsponsored 2 ground shots, of which 1 was a “zero” shot. DEMONSTRATION SHOT (UN OBSERVERS) DOD sponsored 2 underwatershots. 1 shot on a barge sponsored by AEC DOD EFFECTS SHOTS DODsponsored 3 high altitude shots. Total — 35° 2.3 3 shots at high altitude 2 shots underwater These 26 shots were contemplated as of Figs. 2-1A and 2-1B,entitled “Shot Delay Chart,” include all of the events of Operation HARDTACK,Phase I, with an in- dication of the various types of delays preliminary to the actual detonation. CHAPTER 3 SUMMARY OF RESULTS Details of the original scientific concept of the Operation, complete descriptions of test devices, device yield, and performance data are omitted from this report, since details of this information have been included in the Final Op- eration HARDTACK Report of CTG 7.1 to CJTF-Seven. This information is available from CTs 7.1 of JTF-Seven on a “need-to-know” asis. Pages 31-32