Blast Effects (Program 3) This program consisted of five projects. Project 3.1 -- Air Pressure Measurements Agency: Stanford Research Institute (SRI) Operations: A concrete structure instrumented to measure blast load- ing was built on Enidrik. Equipment records were recovered on D+2 and D+8, with gauge recovery later by Project 3.2 personnel. Shots: KOON (Bikini). Radiation Exposure Potential: A potential existed for personnel mak- ing initial recoveries. Staffing: One SRI employee was associated with this project; he re- 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) ICU-1348 Operations: Fathometer traverses, lead~line soundings, and photo in- terpretation were used to measure apparent craters. was mounted on an ICU that traversed the craters. The fathometer Raydist provided 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 and 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