rryYRpEPDER ERLE RRR DD o~a CONFIDENHALS PART Il, CHAPTERS 1, 2 and 3 CHAPTER 1 GENERAL OBJECTIVES 1.1 The HARDTACK test series at EPG was designed to achieve the following objectives which are vital to the continued progress in research and development of atomic feapons and in the improvement of atomic deense: a. near future; —* poses 35 3 c. To continue long-range weapons re- d. search of new techniques, ideas, and To conduct a weapons effects pro- gram required by DOD. CHAPTER 2 TEST EVENTS ORIGINAL CONCEPT 1 May 1957. 2.1 AEC Staff Paper 952 19 (Test Activities for Calendar Year 1958) secured formal approval for Operation HARDTACK,which included the following atomic detonations: FIRM LABORATORY SHOTS SHOT EXPERIENCE 2.2 8 sponsored by LASL — 7 on barges; LABORATORY DIAGNOSTIC SHOTS 1 on surface 9 sponsored by UCRL—all on barges LASL sponsored 13 barge shots. of which one was a one-point safety shot. LASL sponsored 2? ground shots. 3 sponsored by LASL — 2 on barges; 1 ir shallow water or in a barge UCRL sponsored 13 barge shots. UCRL sponsored 2 ground shots, of which I was a ‘‘zero” shot. DEMONSTRATION SHOT (UN OBSERVERS) DOD sponsored 2 underwater shots. DODsponsored 3 high altitude shots. Total — 35 DOD EFFECTS SHOTS 3 The following is a summary of*shots actually detonated at EPG during Operation HARDTACK (Operational phase 15 March 1958 — 15 September 1958): 1 shot on a barge sponsored by AEC -a To continue developmental research on promising weapons; designs; and To test-proof certain weapons in stockpile or to be stockpiled in the CONTINGENCY LABORATORY SHOTS -A” b. 2.3 Figs. 2-1A and 2-1B, entitled “Shot Delay Chart,” include all of the events of Operation HARDTACK, Phase I, with an in- shots at high altitude 2 shots underwater dication of the various types of delays preliminary to the actual detonation. These 26 shots were contemplated as of CHAPTER 3 SUMMARY OF RESULTS Details of the original scientific concept eration HARDTACK Report of CTG 7.1 to of the Operation. complete descriptions of test CJT?r-Seven. This information is available from CTG 7.1 of JTF-Seven on a “need-to-know™ basis. devices, device vield. and performance data are omitted from this report, since details of this information have keen included in the Final Op- Pages 31-32 <. ret mee ge 3