(2) A continuous graphic record was obtained on one platform over a 

 period of five days. This was accomplished by suspending a 

 hydrophone to a depth of 30 feet below the oil platform and 

 coupling the hydrophone output into a sound level meter with 

 an ink-writing chart recorder. 



RESULTS 



The results of the underwater noise measurements in the Santa Barbara 

 area are presented in two sections. The first will deal with the spectrum 

 analyses of the noise from each of the fourteen platforms and will describe 

 the location and operating characteristics of each. The second section will 

 present the results of the five-day continous graphic record for a single 

 platform. 



1. Spectrum Data 



A listing of the fourteen platforms, with an abbreviated code designation 

 for each, is given in Table 1. The table lists the type of platform, its 

 activity (drilling and/or production) at the time of the data recording, 

 the prime power source, water depth, and a general noise rating to give 

 a qualitative rating of quiet vs noisy rigs. The locations of the platforms 

 are shown in Figures 1,2, and 3 which are taken from hydrographic charts 

 showing shoreline, water depth contours, and miscellaneous information, 

 such as pipeline locations. Figure 4 is a chart showing the locations of 

 the areas covered by figures 1, 2, and 3 (outlined in red). This chart shows 

 the geographic relationship to Santa Barbara, its offshore islands, the 



F-4 



