severe fallout or other emergency. This capability provided standing room only and would be used only to protect life and health from extraordinary hazards. 3.9 PROPERTY EVACUATION Tha-d-4 Section made pre-shot surveys to ensure that all excess equip- ment and material had been evacuated from the shot island and those areas subject to significant effects. J-4 assisted H&N in lifting material to the beaches and in relocating it when it was received on the base islands. Vehicles, trailers, and other equipment which were no longer required at Bikini after a particular ahot were turned over to J~4 prior to the shot for return shipment to Eniwetok. The shot phase evacuation of scientific trailers involved the regular users and in addition J-3, J-4, J-6, and H&N. In general, the procedure was for J-3 to determine when the scientific users could afford to release the trailers, particularly those aboard houseboats, and also to determine the facilities required during evacuation and re-entry, such as power for dehumidifiers and air conditioners, and water for Photo Lab tanks. The actual movement of the trailers were accomplished by H&N personnel under J-4 supervision. 3.10 OPERATIONS AFLOAT, RECOVERY, AND RE-ENTRY Operations Afloat. Since the base camp at Enyu, Bikini Atoll, was not contaminated by any shot, sustained operations afloat were not necessary. Complete evacuation was made for the Sycamore and Poplar events. For the Sycamore shot the USNS Ainsworth (TAP-181) and the USS Boxer (CVS-21) were utilized. In general, the majority of TG 7.1 personnel were evacuated to the Ainsworth, with personne! essential to maintaining the operational capability of the Task Group evacuating aboard the Boxer. All Bikini-based helicopters were also evacuated to the Boxer so that recovery missions could be initiated from afloat. Evacuation to ship on —1 days was carried out on three occasions, because the shot was postponed twice after the Task Force had embarked. Embarkation proceeded smoothly on all occasions, but a minor delay was experienced during debarkation because of the time necessary to begin operation of the boat pool. Task Group 7.1 communications aboard the Boxer, in addition to ship's telephones, consisted of Command Net and Administrative Net radios, ciphony telephone and AN/TRC telephone. Primary communications requirements were contact between the Task Force Headquarters afloat and CTG 7.1 at Station 70 on Enyu and CJTF 7 at Eniwetok. Communications were general- ly satisfactory. For the Poplar event the USS Monticello (LSD) was substituted for the USS Boxer, since the Boxer had departed to participate in the Johnston Island Operation. Basically the evacuation and operations afloat were the same as for the Sycamore event. Helicopters were evacuated to the USS Monticello, but since it was a daylight shot L-20 aircraft were flown and orbited in an area approximately 20 miles south of Enyu for the detonation. Eniwetok Recovery and Re-entry. The operational phase of Hardtack 97