HEADQUARTERS, Joint Task Force SEVEN Washington 25, D. C. 20 June 1953, 1600 R Annex B to CUTF SEVEN Operation Order No. 1-53 COMMANDER'S CONCEPT OF OPERATIONS 1. Generale Operation CASTLE will be a series of atomic tests to be con- ducted early in 1954 at ENIWETOK and BIKINI ATOLLS, MARSHALL ISLANDS. The operation will consist of six (6) thermonuclear shots, five (5) of which will have yields in the megaton range, This concept of operations will serve as the basic planning guide for Operation CASTLE. Detailed instructions covering the following on-site activities will be contained in CJTF SEVEN Operation Order No. 2-53. 2. Mission a. To conduct tests of experimental weapons and devices as outlined below. be To conduct the technical and measurement programs. ce 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 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 SHOT & CODE DATE MODEL AND MEGATON YIELD #1 NECTAR N Day BIKINI - On reef 2500 //7- 25—Peb 22 MAR #2 UNION SITE UDay 25—Feb yds SW of NAMU ISLAND. [OGl- BIKINI ~ Intersection 4. 977— 6900! from YUROCHI and @ac/ of arcs with radii of }t mp 3 nautical miles from erf : AOMOEN (Barge). #3 BRAVO BDay | BIKINI ~ Barge, NE of &Mer ' MAR #4 KOON K Day “ ; . #5 ECHO ISLAND. E Day EBERIRU ISLAND. 7 APR tee Lewd Drcurod ,;0% r ENIWETOK - Tower on 2i-Mar Lid Matt hargs lao . BIKINI - Cab, ENINMAN ifMar 29 MHN _U - .,-7f acace g-BLstM) B-1. sewhe TT Go. ins Dou. sme . >Ja: :0_L.3__ OF 2g Cock, LieA