this reference are Fortran computer programs for reducing data from tests on 

 engineering index properties, particle size, carbonate— organic carbon content, 

 direct shear, triaxial shear, consolidation, and permeability. A program for 

 settlement analysis is also included. This latter program incorporates values 

 from the various test results to compute total settlement values due to con- 

 solidation for various characteristics of a given structure. Reference 52 

 contains programs which were originally written for application to terrestrial 

 soils, but may be used, with possibly minor modification, for seafloor sedi- 

 ments. These programs use magnetic tapes for data input and output. The 

 reduction of data from in-situ plate bearing tests has also utilized computer 

 methods. 



Computer methods have been applied to the determination of the 

 geological characteristics of a site in site surveys. Seismic surveys, in particular, 

 have received concentrated efforts directed to the application of computer 

 methods. Data from these surveys are stored and later processed by computers 

 with associated equipment which develops records for further studies and eval- 

 uation. Specialized equipment is also available which will process the data 

 aboard the vessel and present the data in real time. 



The tedious task of developing contour charts for a given site has 

 been simplified and preparation time reduced by computer methods. Two 

 examples of programs developed for this purpose are those developed by IBM 

 (International Business Machines) and CALCOMP (California Computer Pro- 

 ducts, Inc.). The first system is called the IBM 1130 Numerical Surface 

 Techniques and Contour Map Plotting. The CALCOMP system is called 

 General Purpose Contouring Program (GPCP). The GPCP is claimed to be 

 about 30 times faster than manual contouring techniques. An example of a 

 map prepared by one of these programs (GPCP) is shown in Figure 24. 



Physical and chemical oceanographic data have been processed by 

 various computer techniques. Data obtained with in-situ probes for salinity, 

 temperature, and depth which are recorded in computer-compatible formats 

 are swiftly and conveniently reduced by computer procedures. The compu- 

 'tation of temperature and thermometric depth from reversing thermometer 

 data is facilitated by a computer program, such as that shown in Appendix D. 

 Plots of current direction and magnitudes (histograms) 53 are prepared as a 

 routine computer operation. There are many more computer programs for 

 processing oceanographic data that are being used by activities in this field. 



There has been some investigation of statistically processing biological 

 data. These data, however, are not readily amenable to collection in computer- 

 compatible form in site surveys. 



The processing of surface data is almost routine. Data gathered by 

 oceanographic buoys can either be stored or telemetered to a shore- or 

 ship-based station and then easily processed by computer procedures. 



45 



