CHAPTER II, SECTION 1 With the aid of this data it was possible to estimate the horizonal acceleration due to wave action and corresponding forces to be expected on proposed test barges. In many cases these wave forces were more critical than wind forces. The wave action and tide data were used in designing the Large anchorages. FIELD ENGINEERING, The Field Engineering Division at the site for this operation consisted of a Resident Enginver and a staff of assistants set up as a unit invorporating the following four sections, functioning parallel to the Home Office and acting as a field arm: 1. Office Engineering and Design Depe.rtment. 2. Estimating, Reports and Ansiytical Department. 3. Survey Departinent. 4. Inspection and Test Department. The Engineering Division at the PPG was responsibile for furnishing complete local engineering supervision and inspection of construction; for making topographic, hydrographic, control and construction surveys, for preparation of design and drawings for proposed work: for interpretation of plans and specifications; for design and approval of alterations and substitutions; for design and estimates on fieldapproved alterations and additions to permanent base camp facilities; for preparation of record and “as-built”? drawings; for inspection of construction for compliance with plans and specifications; for inspecting and testing of construction materials; for submission of reports and estimates; and for maintaining a complete file of all drawings and other engineering data. OPERATION CASTLE, being spread over two widely separated atolls, presented geographic problems of Engineering control at the seven construction areas and camps. All drawings and work orders were issued and all reports were * prepared at the Engineering Office on site Elmer at Eniwetok where the Resident Engineer and an Assistant Resident Engineer were located. Activities of the area inspectors and surveyfield parties assigned to sites Elmer, Fred and Ursula were coordinated through the main office at site Elmer. An Assistant Resident Engineer was assigned to Bikini Atoll, with an office located on site Tare. Inspection and survey activities in the Tare, Nan, Fox and Charlie construction areas were coordinated through the Tare office. Altogether, the inspection and survey forces accounted for more than 75% of the field eng- ineering manpower because of the dispersed nature of construction operations, For a more detailed discussion of survey and inspection activities, see Sections 1A and 1B respectively. OFFICE ENGINEERING AND DESIGN. A dee’7n force in the field, which reached a maximum of three engineers and seven draftsmen, was responsibile for the production of construction drawings on ali temporary camp facilities; revisions to Home Office drawings incorporating approved changes, substitutions and additional User requests; alterations and additions, both major and minor, to permanent base camp facilities; and correcting all drawings to an “ashuilt’”’ status. Construction camps were not de- signed in the Home Office as in previous Oper- ations in order to relieve tnat office for the heavy and tightly schedwed work load on Scientific Stations as well as to utihze field construction expenence and to design around stocks of locally available material. During this operation, Field Encineering Division designed and prepared 863 Ficld Sketches, 159 miscellaneous drawings and made ‘“‘asbuilt” corrections to over 1200 drawings. The Home Office Engineering Department furnished Field Engineering with a print and one reproducible of all drawings made by Home Office Engineering, which enabled the Field Reproduction Department to process and make proper cistribution of prints in direct response to optimum requirements at construction areas. In previous operations, almost all reproduction of prints had been accomplished by the Home Office. Because OPERATION CASTLE was much larger and more dispersed, the requirements for prints grew to such an extent that in August 1953 a new QOzalid Super Type ‘‘B’”’ printer was installed at Elmer to handle the average weekly run of approximately GUUC prints. During the first half of February 1954, which was the period of peak load, 63 rolls of printing paper were used and a total of 8753 prints were processed in one week during this period. A total of 106,911 prints were processed during the 18- week period from October 1953 thru 1 February 1954. ESTIMATES, REPORTS AND ANALYSES. As a matter of control, all Field Enginecering designs or major revisions to Home Office designs required the preparation of estimates for approval. In general, all these estimates were prepared at Jobsite, as well as analyses in connection therewith. Cost control was maintained by a monthly review of accrued costs on all open work orders, and completion cost estimates were submitted in accordance with established pro- cedure. Preparation of weekly progress reports, monthly narrative reports, and historical installments was likewise a function of this department. Manpower requirements for reporting were minimized by utilizing reports made by Page 2-5