the volume capability of a ship is considered. Also, the people who sent their equipment by ship did not particularly expect quick service. Whenever extra cargo did arrive at the port of embarkation, special types of ships, such as troop transports or reefers destined for this area but not scheduled to transport TG 132.1 cargo, were able to load this material aboard and thus assure earlier delivery. 3.6 MOVEMENT OF DEVICES AND COMPONENTS Based on experience gained from previous operations, it was recommended that account~ ability for all source and fissionable materials involved in Operation Ivy remain with the AEC (SFOO) at all times. This recommendation was approved, and this procedure was followed for both Mike and King components, which were moved in accordance with the following plans: 1. Mike. In the early planning for Operation Ivy the decision was made to transportall the assembly parts of the Mike device on the USS Curtiss. The movement was accomplished as planned, ~ 2. King. It was originally planned that the King weapon, all spare parts, and the necessary handling equipment would be transported on the USS Curtiss. However, by April 1952 it became apparent that the LASL time schedule did not permit completion of the design, procurement of special materials, tooling, machining, and production of the King nuclear assembly prior to the sailing date of the USS Curtiss. It was therefore recommended that the King weapon be transported by air in order to allow the Laboratory more latitude in the time schedule. This recommendation was concurred in by SFOO and approved by CJTF 132, and CTG 132.4 was assigned the responsibility for providing the necessary air transportation. 3.7 3.7.1 ON-SITE OPERATIONS AND REHEARSALS General In preparation for full-scale activities, a forward echelon of CTG 132.1 Headquarters was established at Eniwetok early in August 1952 with an acting commander and task unit and staff section representatives. , On-site operations included the construction of base facilities and scientific stations, the scheduling of operational events, the assignment of transportation, the coordination of off-atoll support, evacuations, the coordination of recovery operations in contaminated areas with the Radiological Safety Unit, the scheduling of sample return by aircraft, and Task Group communications. 3.7.2 Construction TU 11 of TG 132.1 was composed of AEC and contractor civilian personnel who were responsible for engineering, construction, operation, and management of the Pacific Proving Grounds base and test facilities. TU 11 was under the direction of P. W. Spain, who was also the Deputy Commander for AEC of TG 132.1 and AEC Field Manager, Eniwetok Field Office, SFOO. Supervision of jobsite activities of the civilian contractor, Holmes and Narver, was the responsibility of the AEC Resident Engineer, who is a memberof the Field Manager’s staff. The design of scientific structures was the responsibility of HEN, who received criteria from TU 10 through the Field Manager, Eniwetok Field Office. Active design of supporting facilities, such as the causeway and the cryogenics area, began in late October 1951, and the design of scientific structures began in late November 1951. In order to meet established firing dates, the Field Manager notified all concerned on 20 March 1952 that a deadline of 1 May 1952 28