Blast Effects (Program 3) This program consisted of five projects. Project 3.1 -- Air Pressure Measurements Agency: Stanford Research Institute Operations: (SRI) A concrete structure instrumented to measure blast lodd- ing was built on Enidrik. Equipment records were recovered on D+2Jand D+8, with gauge recovery later by Project 3.2 personnel. Shots: KOON (Bikini). Radiation Exposure Potential: A potential existed for personnel magk- ing initial recoveries. Staffing: One SRI employee was associated with this project; he r@q- ceived 1.615 R. Project Report: Reference 59. Project 3.2 -- Crater Survey Agencies: Stanford Research Institute (SRI) Army Map Service (AMS) Lookout Mountain Laboratory (LML) Raydist Navigation Corporation Holmes & Narver, Inc. (H&N) LCu-1348 Operations: Fathometer traverses, lead-line soundings, and photo terpretation were used to measure apparent craters. was mounted on an LCU that traversed the craters. [in- The fathomete Raydist provid some of the location aids, LML provided photography, usually taken on burst day from an RB=~36 of TG 7.4 TAU, and H&N provided lead-line soundings. BRAVO crater was surveyed on D+6; surveys for KOON an UNION were modified and the data supplemented by information obtained from other agencies. Shots: BRAVO, KOON, UNION (Bikini). Radiation Exposure Potential: personnel. Exposure was possible for survey party For example, during the post-BRAVO survey, the radiation 184