CHAPTER Il, SECTION 3 STATIONS: PURPOSE: SITE: 117.01 thru 117.04 CONSTRUCTION: 4-12-56/5-4-56 Velocity versus Time at 3’0" These stations were identical to those of the 116 series on Pearl! with the exception that the signal cable was run back to Station 3020. Pressure versus Time and Pearl USER: DOD-1 PARTICIPATION: 4 CONSTRUCTION: 2-16-56/4-13-56 STATIONS: PURPOSE: These stations consisted of two pipe columns back-to-back embedded in a 4’ x 8’ x 4’thick concrete footing. A pressure gage was installed at the 3’ level of the pipe column facing USER: DOD-1 PARTICIPATION: 18 and 24 CONSTRUCTION: 1-16-56/4-26-56 ground zero, and a second gage was mounted at 90 degrees to ground zero. A signal cable was connected to the gages and run back to recording Station 118.01. A total of 19 cubic yards of concrete was placed. STATION: PURPOSE: SITE: USER: 118.01 Recording Station for Stations 116.02 thru .05 and 117.01 thru .04 Pearl DOD-1 PARTICIPATION: 4 CONSTRUCTION: 2-13-56/4-23-56 This station was a concrete pit 12’ x 4’ x 4’ deep. The roof was of planking and covered with earth. The recording equipment in this station was used for instrumenting the 116 and 117 series stations. A 16’ x 16’ tent provided weather protection over the pit when it was open prior to D-Day. Timing signals and a blue box were SITES: 130.01 and 131.04 Smoke Rocket Launching 130.01 Reef NW of Able, 131.04 NW of Yvonne The Stations consisted of stable wooden platforms size 18’x24’ on a steel frame supported on four 12” H-piles. Required elevation was plus 12 feet, which placed the platforms about 9’ above the coral surface of the reef. The piling for Station 130.01 was driven into the coral to refusal at an average penetration of 13.5 feet, and for Station 131.04, the piling was driven to a depth of 25 feet. Station 130.01 was located within a tolerance of plus 1000 feet to minus 500 feet and Station 131.04 was located to a tolerance of plus or minus 200 feet. The stations were fitted with a fender system on one side and mooring cleats which facilitated boarding the platform from marine craft. One side of the platform had a “lift out” type railing, while the other three sides had removable bolted railing. Eyebolts were installed around the platform as tie points for rocket launchers. Scientific power requirements were estab- installed. A total of 6 cubic yards of concrete was poured. lished at 1-1/2 KW for each station. Two 2 KW, STATIONS: PURPOSE: 120.01 thru 120.04 Pressure versus Time and Velocity versus Time at connected together through an automatic trans- Yvonne DOD-1 signals were provided by the Contractor and a radio was furnished by EG&G. 3°0” SITE: USER: PARTICIPATION: 24 CONSTRUCTION: 4-12-56/4-17-56 These stations were identical to those of the 117 series on Pearl with the exception that the gage mount at 90 degrees to ground zero was not required and the signal cable was run back to Station 3020. A total of two cubic yards of concrete was used on these stations. STATIONS: PURPOSE: SITE: USER: 121.01 and .02 Pressure versus Time on Surface Yvonne DOD-1 PARTICIPATION: 24 Page 2-62 120-volt, single-phase, 60-cycle gasoline engine generators were installed. The generators were fer switch; normal operation called for one of the units to carry the load while the other was on stand-by. Duplex receptacles for two radio For Station 130.01, a standard 14’ x 14’ tent was erected complete with work bench,re- ceptacles, and lighting. Progress on these Stations was slow due to the fact that the work had to be scheduled in accordance with tidal and weather conditions. During the construction of Station 130.01, a DUKW carrying a welding machine was damaged and sank while approaching the construction site. Operations were suspended until the equipment was recovered. STATIONS: PURPOSE: SITES: 131.01 and 131.02 Rocket Trail Photography Able and Uncle