aa 134 lil aircraft and fifteen helicopter aircraft provided from Pacific ir Force resources. The following were major areas of responsibility of the Test Base Unit: "1. Operation of air base facilities at sniwetok and Bikini, including supply, POL, crash reseue, firefighting, refueling, base vuperations, and inter~atoli air freight terminals. 2. Operation of an inter-atoll airlift system between bni- wetok, Bikini, und other islands and atolls (utilizing, when necessary, C-54 aircraft assigned to the Test Services Unit). 3. Operation of an inter-island airlift system at kniwetok throughout HARDTACK, and the operation of a similar system at Bikini until relieved by a Marine helicopter squadron in January 1958. 4. wstablishment of a field maintenance system, operated ona production control concept, augmented b; maintenance personnel from other units and elements of Task Group 7.4. 5. Maintenance of an air evacuation capability. Test Services Unit. The Test Services Unit, commanded by Colonel Wilson ii, Neal, was composed of eight elements and was a contribution of Military Air Transport Service, The unit hau several missions consisting basically of providing technical support service, Military Air Transoort Service was responsible for the organization, manning, training and de ployme:t of the elements tc the proving ground, The Test Services Unit was the largest unit of Task Group 7.4, hav- ing at the peak of the operation more than 1,loo officers, airmen, and civilians, serving at fourtcen separate island iocaticns, Ihe unit had 22 airersaft assigned: seven 5A-16's, tnree U-54's, ten .b-50's, and AFWL/HO \ ~ ro