VII. RECOMMENDATIONS 



The recommendations below are prepared in recognition of the fact that 

 this study is, at the point of this report, a \/ery limited and brief overview 

 of a very complex operation. The recommendations d.re nearly all related to 

 additional data and studies needed for an adequate understanding of this 

 complex problem. It is understood that certain of these recommendations are 

 scheduled as future elements of this program. 



A. Under ,ater Noise Source Levels of CCS Oil and Gas Platforms . Obtain 

 additional field measurements and recordings on existing platforms of all 

 types. Particular emphasis should be placed on drill ships, jack-up rigs, and 

 monopods, for which no data are yet in hand. 



Large differences in underwater noise from platform to platform 

 indicate that a broad sampling of many platforms embracing various types of 

 construction, machinery, installation, and types of ongoing operations is 

 needed to attain a reasonable degree of confidence in the sound source level 

 predictions. 



B. Detection Distances for Specific PCS L ocations. Employ the 

 source-path-receiver model to calculate expected detection range for selected 

 scenarios involving specific OCS locations, noise sources, and seasonal 

 weather conditions. Sound propagation and ambient noise parameters should be 

 selected as appropriate to the specific locality, season, and weather. The 

 receiving animal species should be selected as appropriate to locale. 



G-37 



