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23-25 Sept. 1986

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Displaying Results 1 - 25 of 253
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Underwater Photography at the National Geographic

    Publication Year: 1986, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (582 KB)

    The National Geographic Society has been engaged in the pioneering and making of underwater photographs for most of its nearly 100 years. The first color underwater pictures ever done were made by a Geographic team. A Geographic research grant to Dr. Edgerton financed the building of the prototype deep sea camera that became the standard of the industry. In recent years the Geographic has been the... View full abstract»

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  • ARGO: Capabilities for Deep Ocean Exploration

    Publication Year: 1986, Page(s):6 - 8
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (235 KB)

    Developed by the Deep Submergence Laboratory of the Woods Hole Oceanographic Institution, ARGO is an unmanned instrument platform designed for deep ocean search and survey. Integrating both visual and acoustic imaging techniques for real-time viewing, ARGO is a system which provides continuous, around-the-clock operation for seafloor exploration. With a design depth of 6,000 meters, it is towed on... View full abstract»

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  • The Estimation of Demersal Fish Densities in Biological Surveys Using Underwater Television Systems

    Publication Year: 1986, Page(s):9 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB)

    The raw abundances of many species of demersal and benthic fishes can be estimated easily in situ by surveying transects with underwater television systems and videotape recorders. However, to determine densities (number per unit area) requires an accurate assessment of the area surveyed, which can vary with water clarity and camera altitude. This paper presents a technique for improving density e... View full abstract»

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  • Quantitative Photography on the Gulf of Mexico Continental Slope

    Publication Year: 1986, Page(s):14 - 18
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (465 KB)

    Photography in the deep sea is placed in the context of other deep-sea research. A brief summary of modern techniques for quantitative photography is given along with a description of the Benthic Underwater Camera System (BUCS). Results obtained using BUCS show that trawl samples may grossly underestimate the abundance of deep-sea fauna. Photographs of tube worms and clams taken on the continental... View full abstract»

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  • Time-Lapse Underwater Photography System with Event Sensor Capability

    Publication Year: 1986, Page(s):19 - 23
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (526 KB)

    A 35 mm still photography system with unique time-lapse capabilitities is described. The instrument package can be applied as a self-contained, "intelligent" unit floating in the water column or anchored on the seafloor. Due to low-power microcircuitry, the system can be immersed for several weeks without external battery packs. The camera microprocessor governs a versatile databack unit for data ... View full abstract»

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  • Civilizations and Sea Level Change: Present and Past

    Publication Year: 1986, Page(s):24 - 28
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (370 KB)

    Climate and sea level changes have been relatively stable for the last few centuries. The delicate balance between global and oceanic systems, however, may be altered due to the increased warming of the earth's average surface temperature. A few degrees increase could cause a 15-17 cm sea level rise by the year 2000, resulting in wide spread flooding of low lying areas. Recent studies indicate the... View full abstract»

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  • Ghost Ships: Hamilton and Scourge, Historical Treasures from the War of 1812 Era

    Publication Year: 1986, Page(s):29 - 34
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (719 KB)

    HAMILTON and SCOURGE are two armed merchant schooners from the War of 1812 on Lake Ontario. Capsized in a squall on August 8, 1813, they lie 300 feet deep, 1,500 feet apart, 6 miles off present-day Port Dalhousie, Ontario. They are world-class archaeological treasures: intact, with all their artifacts in and around them, and perfectly preserved. They belong to the City of Hamilton, Ontario, where ... View full abstract»

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  • Life on Board Gold Rush Ships

    Publication Year: 1986, Page(s):35 - 39
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (462 KB)

    This paper contains a description of how passengers lived during their five to eight months voyages from the East Coast around Cape Horn to the California gold fields in 1849. Topics discussed include food and drink, observance of Sunday and holidays, sleeping and eating arrangements, amusement and entertainment, effect of the weather upon passengers, duties of the passengers, and initial reaction... View full abstract»

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  • Fire Department New York Diving Operations

    Publication Year: 1986, Page(s):40 - 43
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB)

    This paper addresses the origin, training, equiping, and operational procedures of the rapid deployment firefighter-divers of the Fire Department New York (F.D.N.Y.). The major impetus for the organization of an in-water firefighting capability came from pier fires along the Hudson River. Toxic and corrosive smoke from creosoted lumber was carried by prevailing Westerly winds over Manhattan's busi... View full abstract»

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  • Low-Cost Remotely Operated Vehicles: Effective Tools for Research Divers

    Publication Year: 1986, Page(s):44 - 47
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (270 KB)

    Low-cost remotely operated vehicles (LCROV's), targeted in the early 1980's for offshore oil inspection tasks, have been deployed by scientists for in-situ observation and photography. Use of the free-swimming camera/vehicle systems represents a safe, economical departure from diver and manned submersible systems that have dominated undersea research since the 1960's. The basic vehicle system can ... View full abstract»

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  • Instrumentation Methods for Measuring Diving Helmet Noise

    Publication Year: 1986, Page(s):48 - 52
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (285 KB)

    For the past few years, the U.S. Navy Experimental Diving Unit (NEDU) has devoted intense effort to the establishment of a methodology and selection of apparatus for the assessment of (1) noise inside a manned diving helmet at depth and in the water; and (2) diver auditory threshold shifts as a function of this noise exposure. A simulated helium-oxygen saturation dive to 850 feet of sea water (FSW... View full abstract»

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  • Helmet Noise and Divers' Hearing

    Publication Year: 1986, Page(s):53 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (285 KB)

    The effects of diving helmet noise on the hearing of divers were assessed during two helium-oxygen saturation dives to simulated depths of 650 and 850 feet of sea water. Twelve male U.S. Navy divers in excellent health and possessing good hearing underwent a series of exposures to deep-sea diving helmet noise for periods up to 4 hours per day. Audiograms were conducted before and after each noise ... View full abstract»

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  • Experimental Hydrodynamic Drag Studies of Scuba Divers

    Publication Year: 1986, Page(s):57 - 60
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (518 KB)

    The phrases "...low profile,...less drag," and "...streamlined design" have all recently been used to describe the hydrodynamic characteristics of new SCUBA diving equipment. The manufacturers are responding to the diving community's plea for ergonomic considerations by producing equipment which will allow the diver to perform underwater tasks more safely and efficiently. However the analyses gene... View full abstract»

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  • Design Quality Assurance for the Charleston Tactical Aircrew Combat Training System

    Publication Year: 1986, Page(s):61 - 65
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (381 KB)

    Design Quality Assurance (DQA) is playing an ever increasing role in major engineering projects. The U.S. government now requires that formal design quality control procedures be implemented by design engineers on all projects, and some federal agencies are supplementing this requirement with independent DQA review programs. This paper discusses the measures that the Chesapeake Division of the Nav... View full abstract»

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  • Structural Design of the Charleston Tacts Platforms

    Publication Year: 1986, Page(s):66 - 74
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    This paper discusses structural design of eight offshore platforms that comprise a Tactical Aircrew Training System range located in the Atlantic Ocean off the coast of Georgia. Design responsibility began with environmental and geotechnical investigations that are discussed in companion papers. These investigations supported functional and cost tradeoff studies from which a conventional pile-foun... View full abstract»

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  • Hindcast of Extreme Wind, Wave, Surge and Current Data Offshore Georgia

    Publication Year: 1986, Page(s):75 - 83
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (838 KB)

    A data base of hurricane-generated surface winds, sea state, storm surge and currents has been produced through a hindcast of 16 of the most intense tropical cyclones to affect the South Atlantic Bight since 1900. The hindcasts were made with numerical prediction models (ODGP, SURGE II) which had been developed originally for the specification of peak hurricane-generated winds, waves and surge hei... View full abstract»

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  • Low-Cost Recovery System for Oil, Gas, and Thermal Seepage

    Publication Year: 1986, Page(s):84 - 89
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (686 KB)

    Describes an innovative method for constructing large, thin-shell, highly reinforced concrete pontoons, domes, and risers for installation over thermal vents and hydrocarbon seeps. Cost projections based on marine structures previously built by the method and tested for long-term durability, show savings of more than fifty percent in labor and materials over their counterparts in steel or conventi... View full abstract»

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  • Uplift Capacity of Piles and Pile Groups in Sand

    Publication Year: 1986, Page(s):90 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (319 KB)

    Offshore structures supported by pile foundations are sometimes subjected to uplifting forces due to wave, wind, and ice actions. This paper presents the results of laboratory model tests for ultimate uplift capacity of single and group metal piles embedded in saturated medium and dense sand. The results have been compared with existing theories. View full abstract»

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  • Irregular Wave Overtopping of Seawalls

    Publication Year: 1986, Page(s):96 - 103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (506 KB)

    This paper discusses recent laboratory tests of irregular wave overtopping of coastal structures being conducted at the Coastal Engineering Research Center (CERC). Current model tests of seawalls has led to an improved method for predicting wave overtopping rates. Structures tested included seawalls fronted by a variety of riprap revetment configurations as well as a seawall with no fronting revet... View full abstract»

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  • Repair, Evaluation, Maintenance and Rehabilitation of Rubble-Mound Breakwaters and Jetties

    Publication Year: 1986, Page(s):104 - 107
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Repair and rehabilitation of the five-hundred-twelve existing rubble-mound structures within the US Army Corps of Engineers is becoming increasingly important because many structures have deteriorated to the extent of imparing their design function. Also performance criteria have increased at many sites but because of curtailment of new construction, structures at these sites will have to be upgra... View full abstract»

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  • Marine Applications for a Continuous Fiber Optic Strain Monitoring System

    Publication Year: 1986, Page(s):108 - 117
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (654 KB)

    This paper describes preliminary bench tests results and examines two marine applications for a continuous fiber optic tensile strain sensor cable. The prototype sensor, which consists of an optical fiber in a composite jacket, produces an optical attenuation profile which can be correlated to tensile strain. Conventional optical time domain reflectometry is used to quantify strain level and defin... View full abstract»

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  • Arcair®Sea Torch®Electrode Holder and Sea-JetTMElectrodes

    Publication Year: 1986, Page(s):118 - 120
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (233 KB)

    The Sea Torch®electrode holder and Sea-JetTMexothermic electrodes are used throughout the diving industry to perform underwater cutting operations. The single unit molded construction, the spark arrestor design and a brass oxygen supply tube make the Sea Torch electrode holder electrically safe and very rugged. This torch's design makes it easy to handle, very maneuverab... View full abstract»

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  • Advances in Underwater Welding

    Publication Year: 1986, Page(s):121 - 126
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB)

    A discussion of dry hyperbaric and wet welding will be made with comments on the economics of both types. The Underwater Welding Specification AWS D3.6 will be described as an aid to engineers and contractors to prescribe and assure sound underwater welding. Recent research and development work in underwater welding will be discussed and the effects of hardness, porosity, and fatigue on wet welds ... View full abstract»

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  • Underwater Welding Techniques & Technologies

    Publication Year: 1986, Page(s):127 - 129
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB)

    The variety and amount of both wet and dry U/W welding taking place today in the offshore oil and inland sectors are such that a broader basic understanding of U/W welding techniques and technologies are needed to progress the integrity and quality of all U/W welding. To understand the problems which initiated the development of U/W welding, the solutions U/W welding has provided, and its benefits... View full abstract»

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