iting TRANSIT BLUE BOOK 1. GENERAL SITUATION ene 1.1 General This plan is adirective plan of eperations for the conduct of CASTLE Project 6.4. lit defines the purpose and scope of the project, the assumptions which guide and justify the project, and the general operations which are necessary for accomplishment. Because Project 6.4 is a quasi- naval operation, this plan is prepared in the format recommended by the Naval iianual of Operational Planning, 1948 Edition. Detailed planning for the technical and scientific work on Project 6.4 is contained in a series of annexes to this plan. The annexes are in the same format as the basic plan and are supported in detail by tabs which reflect the current status of planning and accomplishment. It is intended that this plan, together with annexes and tabs, will be sufficiently complete to form a basis for command decisions and preparation of on-site reports. 1.2 Nature and Scope of Operations 1.2.1 Nature of Operation Project 6.4 is a proof test of shipboaid countermeasures, damage control, and industrial rehabilitation procedures against radio~ logical contamination effects in atomic warfare. For purposes of ship activation and operation control, Project 6.4 has been identified by the unclassified Bureau of Ships code name "Project Transit". Project TRANSIT is composed of two specially altered and instrumented drone LIBERTY ships, a control P2V5 aircraft, two fleet tugs for escort, tow and de- contemination operations, and an operations base on Parry Island (ELJER), Iniwetok Atoll. One ship will be equipped with candidate A; protective devices and will be fully instrumented; this ship will be identified as TRANSIT ABLE. The second ship designated as TRANSIT BAKER, will be unprotected, but will be instrumented the same as TRANSIT ABIE. TRAISIT BATER will alse incorporate special ventilation tests. The drone ships will not be manned during the experiments but will be maneuvered by radio control from an aircraft. The ships will be steamed into an area of high fall-out activity subsequent to each event participated in. After each test, it is planned to board the protected ship (TRaiSiT ABL™) and steam her to Eniwetok, radiation levels permitting. In event of excessive radiation levels, both ships will be recovered by tugs after each shot participated in and towed to Eniwetok for post-test operations. Post-test operations will consist of: (a) detailed radiological survey of each ship, both above and below decks. 005521 ST. LOUIS =REG