. Designing a U-style mooring for use with current Oceanography. the surface buoy moved about. This concept has been suc- cessfully used in the NOMAD buoy system where the upper portion of the mooring cable was dacron and the lower portion was polypropylene line [Smith, 1965]. The "S" shape formed by the two lines tends to reduce surface excursion and absorb shock forces in turbulent FIGURE k - TWO TYPES 0? SYNTHETIC LINE ARE USED IN THE SLACK LINE. Appendix A contains detailed information on the polypropylene and nylon line chosen for the mooring. 3. Line Lengt
. Designing a U-style mooring for use with current Oceanography. the surface buoy moved about. This concept has been suc- cessfully used in the NOMAD buoy system where the upper portion of the mooring cable was dacron and the lower portion was polypropylene line [Smith, 1965]. The "S" shape formed by the two lines tends to reduce surface excursion and absorb shock forces in turbulent FIGURE k - TWO TYPES 0? SYNTHETIC LINE ARE USED IN THE SLACK LINE. Appendix A contains detailed information on the polypropylene and nylon line chosen for the mooring. 3. Line Lengths The lengths of line required for the taut portion of the mooring are discussed in the Conclusions section of Appendix B. For the slack moored marker buoy line, employing a deep-water line length-to-water depth ratio of indicates that 3200 feet of synthetic line are required for the 1800 foot (300 fathom) specified water depth. This slack marker line would consist of 1600 feet each of nylon and polypropylene line. Both segments of line would be 3/8" lay-constructed line with approximately equal working loads. The length of groundline was determined by consider- ing the navigational accuracy expected upon returning to the site if the marker buoy were missing and the acoustical or mechanical release malfunctioned making grappling necessary. Knowing the line of bearing between the two anchors (re- corded during implanting operations), the recovery vessel 31. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Picciulo, Jonathan Monterey, California: U. S. Naval Postgraduate School
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