co C Defeuse Vuclea- aa Operation Order CTIG 7.3 No. 5 4, 30 Joint Task Force SEVEN RG 97% Agency. Task Group 7.3 Location BIKINI Atoll, M.-I. “wyre fo USS BAIROKO (CVE~115) . Acccss Nu. GJ A I7¥¢oe lao thy 21 February 1954, 2000M FoleerSTECTE Task Organization:pla 53 Same as in CTG 7.3 OpPlan 1-53. 1. General. This order is based on CJTF SEVEN letter J-3/S-131-54E of 19 February 1954 directing that JTF SEVEN will conduct a rehearsal of BRAVO shot on 23 February 1954 (Bx Day). is O645M. Rehearsal time of detonation (H Hour) The rehearsal will commence at 0630M, 22 February 1954. All units of TG 7.3 will participate in the rehearsal insofar as practicable without delaying preparation of projects or evacuation and transfer of men and materials required for BRAVO or subsequent shots. 2 Mission. The mission of TG 7.3 is to perform ship, aircraft, and small craft movements and exercise all communications and other electrical systems as will be done on BRAVO day and the day previous in order to practice such movements, ascertain the accuracy of timed sequences and insure reliability and non-interference characteristics of the several systems. 3. Tasks of Task Group 7.3. Same as para 3, CTG 7.3 OpPlan 1-53 4. Tasks of subordinate units. Applicable tasks in CTG 7.3 OpPlan 1~53, amplified and augmented as follows: a. Commander Special Devices Unit (CTU 7.3.0) (6) Perform the mvenents scheduled in Annex A of this OpOrder. (7) Simlete inflating and launching a constant altitude (45,000 ft) balloon (70'x100') not later than H-6 hours. Inflation and launching. requires about one hour and is to be done with minimum relative wind. (8) Maintain a position within 24 miles of a point 18 miles 170°T from 300 foot photo tower on ENYU from H-3 hours to H/5 minutes, During the period H-lf minutes to H/5 minutes and whenever a TG 7.4 effects aircraft or photo aircraft is checking in over the RAYDIST installation maintain a "stern-on" or other aspect which gives optimum results on the RAYDIST receiv- ing equipment. ®. Commoner Surface Security Unit (CTU 7.3.1) Nous an (10) Perform the movements scheduled in Annex A of this OpOrder. 1 a oO