the lagoon proved to be dangerous to personnel. Salt spray and water made maintenance of electrical equivment on the rafts difficult. Both electrical and moving mechanical parts corroded quickly. Only a minority of project personnel were able to work at the raft stations without becoming seasick. Only two of the original nine raft stations sampled successfully during Shot 1. All raft instrumentation recoverable after Shot 1 was removed from the rafts and used at land stations. Since no samples were obtained from predicted base surge region of any CASTLE shot, none of the desired information about the charac= teristics and significance: of the radioactive debris distributed by base surge phenomena was obtainsde 2e7 RECOVERY AND SHIPMENT OF SAMPLES Recovery was carried out on the fourth, fifth, and ninth day after Shot 1, the first day after Shot 2, the first and second day after Shots 3 and 4, and the first day after Shot 6. A two-man team used a 10-passenger helicopter to recover samples from the land stations. A second two-man team used an LCM to recover samples from the raft stations after Shot 1. The recovery teams removed the spider assemblies from the IFC's, placed them in dust-tight boxes, and moved them to the packing area, All locations available for packaging samples were somewhat windy and usually in contaminated areas. Packing was done on an open barge near Nan after Shot 1, in a Tare tent after Shot 2, ina Nan tent after Shot 3, on Oboe, in the rear of a closed truck turned on its side after Shot 4, and in a tent at Elmer after Shot 6. The jars were removed from the trays and capped. The trays were surveyed where possible, and a few samples selected for decay measurements at the Project 2.6b Elmer laboratory. Plastic "snap-on" caps were put on the glass cups, and the trays were sealed with aluminum foil. The trays and jars were returned to Army Chemical Center, Maryland by a special sample return plane which usually left Eniwetok one or two days after recovery was completede 20