Sea Floor Mapping by Microcomputer-Assisted Side-Scan Sonar
D. B. Prior, J. M. Coleman, R. L. Caron, E. G., G. Waltham Massachusetts, 1981. "Sea Floor Mapping by Microcomputer-Assisted Side-Scan Sonar", Offshore Geologic Hazards: A Short Course Presented at Rice University, May 2-3, 1981 for the Offshore Technology Conference, Arnold Bouma, Dwight Sangrey, James Coleman, David Prior, Anita Trippet, Wayne Dunlap, James Hooper
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An improved microcomputer-assisted side-scan sonar has been developed which provides automatic correction for slant angle and ship’s speed. Sonographs are scale correct and give true plan views of the sea floor. Automatic signal amplitude corrections are applied so that darkness tones relate directly to the backscattering properties of the bottom morphology ans sediments. The digitally acquired data can be displayed in real time or stored on magnectic tape for replay and image enhancement. This system is particularly useful for sea floor mapping, since true-scale mosaics of large areas of sea floor can bo obtained. Also, accurate remapping is now possible, and data are suitable for a variety of analysis procedures which yield information on sea floor morphology and sediment characteristics. The system is being successfully used in mapping the entire submarine geomorphology of the Mississippi delta.
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Offshore Geologic Hazards: A Short Course Presented at Rice University, May 2-3, 1981 for the Offshore Technology Conference
Practically all parts of the United States continental shelves and some segments of the adjacent upper continental slopes are presently subject, or will be in the near future, to exploration and development. The same is true for many continental margins all over the world. Unless the potential influence of hazards is taken into account in the design, installation, and operation of any offshore structure, such structures can pose a threat that could result in pollution, damage, or loss of lives and equipment. This publication, written to accompany an AAPG Short Course, provides some kind of summary of current [at the time of writing] knowledge. Higher categories of geologic hazards as well as individual potentially hazardous geologic phenomena are described and discussed.