Figure 1 5 is a mooring leg selection chart showing depth versus the 

 S/Y ratio for various wire and clump sizes considered. This chart will enable 

 one to select a wire-clump configuration that results in the shortest scope at 

 a selected depth. Figure 16 was plotted to show the total horizontal projec- 

 tion as a faction of the vertical projection for the mooring system configurations 

 considered. Figure 17 was plotted to illustrate mooring leg wire rope weight as 

 a fraction of depth. 



The results of the mooring system analysis indicate that the weight of 

 each mooring leg will require catenary support buoys. Catenary support buoys 

 should be located approximately 1,000 feet from the surface power plant to 

 provide a constant holding force on the plant. 



Table 10 presents a summary of mooring leg data for the surface plant 

 mooring systems at depths of 600, 2,000, 6,000, 10,000, 15,000, and 20,000 

 feet. 



SHORE-BASED POWER SYSTEMS 



Shore-Based Power Sources 



The power sources discussed earlier for surface power systems are also 

 suitable for use in shore-based systems. As in the case with surface systems, 

 diesel engine generator sets were considered the most cost effective power 

 plants for shore-based systems. The diesel engine generator sets would be self- 

 contained at the 30-kw to 300-kw power levels, with conventional radiators 

 for cooling and battery starting systems. Heat exchanger and cooling tower 

 installations with compressed air starting would be required for diesel engine 

 generator sets at the 1 ,000-kw to 3,000-kw power levels. 



Shore-Based Generating Plant and Transmission System 



The basic components of the shore-based power plants would be 

 housed in a steel-framed, corrugated-steel-clad building. They include a 

 diesel-electric generating plant, with all of the required auxiliaries, handling 

 equipment, plant services, and monitoring and control equipment. Interme- 

 diate and high-voltage transmission cables would be used for transmission 

 over distances of 10, 50, 100, and 500 nautical miles. In some cases, DC 

 transmission is used. These DC systems require converters or rectifiers at the 

 shore-based plant and the equivalent inverter at the load module end. The 

 load module will be equipped with subsystems similar to those required with 

 the surface-tendered plant, with the exception of the DC inversion equipment 

 required when transmission from the shore-based plant is at direct current. In 

 addition to the inverter, the load module requires a bank of static capacitors 

 to provide the reactive component for the capacitor and the blocking voltage 



49 



