of the world which were prepared by the IGY World Data Center and the 

 National Oceanographic Data Center. 49 Since these publications were prepared 

 several years ago, information on some of the vessels may be slightly outdated. 

 Information on the remaining vessels was obtained from various miscellaneous 

 sources. The purpose of this listing is to identify all of the vessels that may be 

 available for use in a particular survey project. These vessels are operated by 

 the designated organizations, whose work may have priority; however, use of 

 these vessels may be arranged by others, in some cases on a "not to interfere" 

 basis. As an example, NCEL used the Bureau of Mines vessel Virginia City on 

 this basis. 



There are many oceanographic vessels owned by various private 

 enterprises that may also be available for use in a particular survey project. 

 The preparation of an exhaustive list of these vessels has not been attempted. 

 A brief survey was conducted by NCEL to determine the type of vessels, costs, 

 and other features of the vessels that are available for lease along the Southern 

 California coast. Although these vessels are available for lease, in most cases 

 a long lead time is required to secure their use. Costs for these vessels ranged 

 from approximately $500 per day for a 65-foot-long vessel to $2,500 per day 

 for a 185-foot-long vessel. In general, costs were variable and depended on 

 ship size, available equipment, and other factors. 



Submersibles 



Table C-2 is a listing of various oceanographic submersibles in operation, 

 or being designed or fabricated in the United States. The information in this 

 table was abstracted from Reference 50 and other sources. Many of the sub- 

 mersibles operated by private industries are available for lease, although the 

 cost to lease these submersibles is high. Depending on the particular submers- 

 ible, the cost for leasing a submersible could range from $3,000 to $10,000 

 per day. The particular submersible that can be used will be dictated by the 

 cost, the availability of the submersible, and the requirements of the particular 

 survey project. 



DATA PROCESSING AND ANALYSIS 



There are many specialized instruments and techniques to process and 

 analyze data collected in site surveys. Systems which are generally applicable 

 to site surveys, will be described; specialized systems associated with a particular 

 manufacturer's product will not be discussed. 



In foundation engineering, computers have been used to process and 

 analyze data on ocean sediments. Reference 51 is an accumulation of data 

 processing and analysis techniques for tests on sediment core samples. I n 



44 



