The tasks assigned to Task Group 7.1 for accomplishment in support of the CASTLE mission were formulated throughout 1953 and were outlined in CJTF SEVEN Operation Plan No. 3-53 as follows: l. Position, arm, and detonate the CASTLE weapons and devices. Conduct technical and measurement programs. Complete the installation and calibration of the devices and all instruments and test apparatus. Recommend to CJTF SEVEN safe slant range distances from ground zero for aircraft during shot periods. Conduct the radiological safety program. Provide technical and technical report film coverage. Schedule the inter-atoll movement of weapons and devices and provide required technical assistance to other task groups in connection with their responsibilities for such movements. Be responsible for the removal of all Task Group 7.1 personnel and necessary equipment from shot site danger areas. 9. When directed by CJTF SEVEN, evacuate Task Group 7.1 personnel from Bikini Atoll. “10. Be prepared, upon receipt of directives from CJIF SEVEN, to conduct emergency post-shot evacuation of Task Group 7.1 personnel from Eniwetok Atoll. ll. Keep CJTF SEVEN informed on test and technical develop- ments affecting the operational plan and military support 51