PROGRAM 9 ELECTROMAGNETIC PHENOMENA Equipment and techniques to be used in this program for Operation Ivy have been tested during Tumbler-Snapper. As practicable, the results obtained are being used in instrumentation refinement. Mr. Gordon C. Arnold, Jr. Has been assigned as Project Officer’ of Project 9.4. PROGRAM 16 TIMING AND YIRING Edgerton, Germesnausen and Grier personnel plan to supervise the installation of electronic equipment aboard the USS ESTES while the sip is at Mare Island Shipyard during the early part of July. Television gear and accessories were to be snipped to Mare Island on 1 July. The Release Tone Project (Project 10.2) has been added to this program. Tnis project will be sponsored by the AEC and performed by Sendia Corporation under the direction of Mr. C. B. McCampbell. This release tone will be used to furnish the starting signal to the EG&G sequence timer on King Snot. PROGRAM 11 SEISMIC AND GEOLOGICAL SURVEY Project 11.1 Soundings of the Ocean Side of Eniwetok Reef The hydrographic survey to determine the configuration of the ocean side of the reef is now underway. The team has been at the Atoll for several weeks but the work has been delayed to some extent by the failure of some shipments to arrive. This includes recording cameras, fathometer paper, and spare parts for the 42-ft sounding boat. Requests for replacements have been made, and it is expected that the survey will be accomplished in the next few weeks. 40)