and drawings which were handcarried took varying lengths of time because of the uncertain schedules of air transportation, occasioned by delays at Fairfield-Suisan Field (later renamed Travis Air Force Base), at Hickam Field, and at Kwajalein. This was somewhat of a handicap, especially in keeping the personnel at the Jobsite informed of the latest revisions in drawings made necessary by changes in requirements, The inconvenience and delays due to time required to get information from the Home Office to the Jobsite were more than offset by the close liaison that was possible between the Laboratory and the Engineering Division of H & N, The many contacts by phone and the many personal visits assisted materially in the development of the unusual designs required, It would have been almost impossible to have carried on the engineering designs at the Jobsite, Experience proved that the decision to carry on the design in Los Angeles was a wise one. Throughout the Project, the far-sighted policy of test authorities in taking a long-range view of development of physical facilities of the proving ground served to advance the progress of the engineering work, It was recognized that the new and experimental nature of many of the concepts would require some trial and error and some adaptation to the site planning and to other, possibly conflicting, objectives. Ina project of such complexity and magnitude all eventualities could not possibly be anticipated by any one person or group of specialists, and rapid scientific advancement during the planning period required constant modification of plans, Test authorities recognized that revisions and changes would be inevitable, and that if tests were not to be impeded engineering work would have to be spread out over a long period of time, The constantly changing requirements constituted a challenge to engineering ingenuity, but cooperation and teamwork carried the Project through to the successful tests of 1951.