CHAPTER IV, SECTIONS 4 and 5 period the services of the LSD were made available for hull repairs. On completion of the operations at Bikini all the craft were returned to Eniwetok, where major overhaul was scheduled. Returrcd to the U.S. Navy after OPER: ATION IVY 1-LCU 2 - YC Barges (wooden) 6 - LCMs Maintenance facilities at Eniwetok consisted primarily of the engine repair shop, DUKW shop, electrical and injector shop, the hull repair yard, and a Gilhoist and floating dry dock. These were adequate. Water Taxis and LCMs were beached for major repairs; tugs, LCUs and Received from the U.S. Navy for OPERATION CASTLE 4 - LCUs 5 - LOMs 2 .- YC Barges (steel) barges were dry-docked. Figure 4-34 shows an LCU in the floating dry-dock. To The H&N marine repair group was called upon during this Operation tor servicing and maintenance on craft under the control of and operated by other Task Units. Tris work was accomplished under Job IV work orders. returned after OPERATION 1 - YTL (wooden) 4 - LCUs 1 - AFDL-5. (To be returned to Jobsite after dry docking). Received from the U.S. Army All items of maintenance work performed on each craft were recorded in a maintenance history. A record of dry dock operations indicated tuat the AFDL-S was used for 31 dockings during the period from January 1953 through April 1954. 6 - Army type 505-ton barges - four of these were expended for Scientific purposes. 15 - DUKWs. One expended and surveved, Returned to the U.S. Army 15 - DUKWs. EXCHANGE OF CRAFT. The terms and conditiuns that apply to loans of marine cratt by the Inavy Department to the Atomic Energy Commission is outlined in the Joint AEC - Department of the Navy agreement OPNAV 4000 A comparison of costs of major overhaul of LOUMs by the Navy and the Jobsite was made. The Jobsite costs were actual costs incurted, and the Navy costs were those cstimated for work on LCMs returned to the Pearl Harbor Navy Yard after OPERATIONIVY. This comparison is ind’cated below. LO A (7 1 53). In accordance with this agree- ment, joint inspections were made on all exchanges effected for thi» Operation. The reports of these inspections were furnished the AEC Resident Engineer, and copies were retained in the Contractor's files for future use in adjudication of costs. The following are the exchanges effected during this operation: Based on this comparison, all LCMs hereafter will be retained at the Jobsite after completion of an operation, and the boats will be overhauled by Jobsite forces and mothballed on the site. NAVY YAR Hull Machinery be CASTLE CPDL D Le A-boat B-boat C-boat $9,362.00 3,287.00 39,576.00 3,287.00 24,910.00 4.665.00 D-boat $5,240.00 4,665.00 SECTION 5 AIR TRANSPORTATION Interatoll air transportation for the move- ment of personnel, mail and urgentiy-need: a materials and supplies was provided hy meais of PBMs until 30 January 1953. On this dite the landing field on Peter-Oboe was placed .n use and thereafter flights of C-47 type planes were regularly scheduled. At first the schedules called for two flights per week, but were increased as the tempe of the work increased, reaching a peak in 19514 of four flights per day six days a week. In March and April of 1954. during pericds in which the airfield at Bikini could not be used, PBMs were again provided to furnish this support. Passenger scheduling Pege 4-47 a eee