Macy 



Table 2 

 Relative Characteristics of Several Common Platform Types 



regarded as proprietary and is not exchanged as freely as in the more orthodox 

 branches of naval architecture. It is hoped that in time the industry will come 

 to realize the mutual benefits of a free exchange of data. 



ACKNOWLEDGEMENTS 



Assistance is acknowledged from the many companies which contributed 

 information and photographs, notably the following: Chevron Oil Company; Kerr- 

 McGee Oil Industries, Inc.; Ocean Drilling and Exploration Co.; The Ingalls 

 Shipbuilding Corporation; Global Marine Exploration Co.; Reading and Bates 

 Offshore Drilling Co.; Bethlehem Steel Corporation; The Offshore Company; 

 Western Offshore Drilling and Exploration Company; Loffland Brothers Com- 

 pany; and Otis Engineering Corporation. 



REFERENCES 



1. Kastrop, J.E., "Semi-submersibles: New Breed of Floating Rigs," Petro- 

 leum Engineer, Oct. and Nov. 1965 



2. Fein and Freiberger, "A Survey of the Literature on Shipboard Ice Forma- 

 tion," Naval Engineers Journal, pp. 849-855, Dec. 1965 



470 



