,’) HEADQUARTERS,Joint Task Force SE~ Washington25, D. c. 18 December1957 ChanRe 1 to J’TFSEVEN OperationPlan 1-58 (HARIYfACK) The followingchangesand amendmentsare made to JTF SEVEN Operation Plan 1-58, dated 1 October 1957: 1. Referenceis made to page 1 of baaic plan under “definitionof Terms used in this planf’.The last sentenceunder “Air Control Area” is deletedand the followingsubstitutedtherefor: Limits of the IfAirControlAr&an”wil.l be as follows: Centered in the ENXWETOK Atoll at coordinatesU.e 301 N 162° 15! E, strike a circlewith radius of 100 nauticalmiles; centeredin the BIKINI Atoll at coordinatesI-l”30t N 165° 30t E, strike a circlewith radius of 100 nauticalmiies. Connectthe North and South arcs of these circleswith tangents. This racetrackshaped area will constitutethe “Air ControlArea”. 2. The third sentenceof paragraphla of basic plan, asreads “First detonationis scheduledfog l-April 1958n is deleted, and the detonationiS scheduled followingsubstitutedtherefor: )lFirst for 15 April 19581!. 3. Paragraphlb of the basic plan is deleted and the followingsubstitutedtherefor: b. 4. All planning and preparationsfor OperationHARM’ACKwil.lbe conductedon a strict “need-to-know”basis. Paragraph3C (8) of the basic plan is amendedby aiding “and the USNS AINSWORTH”. 5. Paragraph3C of the basic plan is amendedto include sub-paragraph (lI.)as follows: (11) Task Group Commanderswill submit check lists of tasks to be accompl.ighed for period prior to, duringand after each detonation. 6. Paragraph 5b (2) is deleted and the followingsubstituted therefor: Unit &g DurinR Bikini Shots CT.G7.1 NAN Island or ELMER Island or USS BOXER BurinJzSimultaneous At Other Times Shots NAN Island or ELMER Island or USS BOXER ELMER Island Pages A-1, A-l-1 and A-2-1 are downgradedto UNCLASSIFIED. Annex C is changedas follows: ‘827’5~ a. Paragraph2C - add to second sentence: Ndated 22 October 1957”. b. Paragraph2d - changethird sentenceto read: lrInstructions for preparationand maintenanceof these logs are contained in ANNEX Ato SOP 205-1, dated 11+October 1957”. MiUTiWWRCH&M 7 ~~}-~<-J.q ~<; ~“