staff, although one Neval officer has been requested. (Note: Not all of tne scientific staff will be directly concerned with the Eniwetok survey, since this work is only a portion of a major oceanographic expedition on wnich the ships will be engaged this Fall.) Two seismic traverses will be run across the lagoon in a southeastnortawest and a northeast-southwest direction, each traverse extending seaward ebout 20 miles in each direction. The receiver ship will remain _ stationary waile tue firing ship will prozeed along the traverse lines firing cnarges in the water at int2:veals of about 1 mile. Firing across tne lagoon will be continuous in to about the 20-fatnom line lagoonward of tre islands. Tne charges will vary from 1 1b to about 100 lb of TNT, these to be fired at a dept.. of about 100 ft. This will necessitate avoiding the areas woere power signal and timing cables lie on the bottom of the lagoon. In running tue traverses, precautions will have to be taken to avoid sallow unmarked coral neads in the lagoon. Tunis will probably require t..e essistance of a Holmes and Narver boat operator well acquainted with tre lagoon, and pernaps a nelicopter as forward lookout. Tue ships draw 13 ft of water. According to present information, one of the ships may not be available until about tse time of tne Mike Shot, so the survey may not be possible until after that shot, the time perhaps extending beyond the King Sact. (The survey will require about 8-10 days working time.) In this case radioactive monitoring will be required aboard the two vessels. BEST AVAILABLECOPY as -m~_-