HEADQUARTERS, voint Task Force SEVEN Washington 25, D. C. 10 November 1952 Annex A te CJTF SEVEN Operation Plan No. 3-53 CONCEPT OF OPERATIONS 1. General. Operation CASTLE will be a series of atomic tests conducted early in 1954 at ENIWETOK and BIKINI ATOLLS, MARSHALL ISLANDS. The operation will consist of seven (7) shots. This concept of opera~ tions covers the period beginning ith the deployment of major ele~ ments of JTF SEVEN in the forward area and terminating with the completion of tests, collection of scientific data and disposition of radioactive samples. 2, Mission a. To conduct tests of experimental weapons and devices as outlined below. b. To conduct the technical and measurement programs, c. To provide for security of the joint task force and ENIWETOK and BIKINI ATOLLS, 3. Tasks for Subordinate Units. The conduct of missions 2a and 2b, above, is the responsibility of the Scientific Task Group. Other task groups will furnish the support necessary to fulfill these missions. To insure successful accomplishment of the missions, this support will be coordinated by CJTF SEVEN. 4. Shot Schedule (For prediction of yield and model, see Annex E, Scien- tific Test Programs), SHOT & CODE #1 BRAVO #2 UNION #3 YANKEE #4 ECHO #5 NECTAR #6 ROMEO #7 ~=KOON DATE SITE B Day BIKINI - On reef 2950 feet, bear- 1 Mar 250 T from SW tip of NAMU. U Day BIKINI (Barge) - Intersection of 11 Mar arcs with radii of 6900 feet from YUROCHI and three (3) statute miles from AOMOEN. Y Day BIKINI (Barge) - UNION crater. E Day ENIWETOK - EBERIRU ISLAND. N Day BIKINI (Barge) ~ UNION crater. R Day BIKINI (Barge) - UNION crater. K Day BIKINI — ENINMAN ISLAND, 22 Mar 29 Mar 5 Apr 15 Apr . 22 Apr A-1