Thesis: Ocean E., Massachusetts Institute of Technology, Department of Ocean Engineering, 1972 / Bibliography: leaf 73. / Ocean E. / Ocean E. Massachusetts Institute of Technology, Department of Ocean Engineering

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998. / Includes bibliographical references (p. 109-110). / Since the early nineties, the introduction of new High Speed Car-Ferries has had an important effect on waterborne transportation networks. In some of the most characteristic routes around the globe, a substitution process of conventional ferries by high-speed units in a certain domain of distances is taking place. The purpose of this research is to analyze the economic parameters that define the Fast Ferry market and to study the economic feasibility of such a service. The demand for the service, the cost structure of both the fast car-ferry and the conventional ferry as well as competitive issues characteristic of the industry will be analyzed to determine the feasibility of a high-speed service. Special attention will be paid to the possibility of substituting conventional ferries with fast car-ferries. / by Javier Saez Ramirez. / S.M.

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998. / Includes bibliographical references (leaves 92-94). / The mechanisms responsible for various disturbances in the wakes of ships have been investigated for some time. Efforts to define and characterize the contributing factors and resulting turbulent wake manifestations conclude that ship length, speed and geometry play integral and interdependent roles. Previous experimentation in the Ocean Engineering Towing Tank at MIT on small scale model ships supplied data for Reynold's Numbers up to ~ 0(106). The work included in this thesis represents a continuation of those efforts up to Re O(107) using a model DDG51 (5514) Destroyer. Through endeavors to identify wake phenomena and closely examine possible sources, previously unvisualized charicteristics were revealed and the calibration, comparison and validation of numerical simulations were made possible. Experimental efforts were concentrated on the study of flow in the wake and near the bow of the model DDG-51 Destroyer (5514). Qualitative and quantitative flow visualization methods were adapted, designed and implemented including ship-fixed and tank fixed streak videography and Digital Particle Image Velocimetry (DPIV). In addition, the experimental apparatus was modified for similar flow visualization near live fish, and a description of this endeavor and its progress are included. / by Danielle Ames. / S.M.

Thesis (S.B. and S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998. / Includes bibliographical references (p. 123-124). / Analysis of investment projects and strategic decisions using option theory has gained wide acceptance among corporate finance scholars and professionals. In the shipping and shipbuilding industries, option analysis is still in its infancy, and few professionals are familiar with option valuation tools. At the same time, practically all shipbuilding contracts contain option elements, the value of which most industry players do not know how to calculate. Newbuilding options give shipowners closing newbuilding contracts a right, but not an obligation, to enter into additional newbuilding contracts, with predetermined terms, at a later date. This thesis presents a general introduction to option theory as it applies to traded financial securities. This framework is extended to newbuilding options. Characteristics of the newbuilding markets are given, and fundamental stochastic processes that can describe newbuilding prices are introduced. Based on these stochastic processes, closed-form formulas for calculating the value of newbuilding options are presented. Actual observations of shipbuilding prices are analyzed in the context of the stochastic models. The results of this analysis are discussed as they apply to the option formulas and to the practical aspects of the newbuilding option framework. Recommendations are given on how to analyze real cases in which newbuilding options appear. / by Morten W. Høegh. / S.B.and S.M.

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998. / Includes bibliographical references (leaves 92-94). / There is a vital need to update the hydrographic database of the United States. NOAA statistics show that with current survey technologies it will take nearly 40 years to update U.S. nautical charts. Hydrographic surveys require a careful record of depth, position, tide, and the motions of the survey platform. The U.S. Army Corps of Engineers is one highly regarded organization which performs hydrographic surveys. They impose a strict standard of accuracy for certain surveys. For these Class 1 surveys, position must be within 6 meters and depth must be measured within 0.5 feet. This thesis documents the development of a new technology to meet these needs and provide hydrographic surveys in more cost effective ways than existing techniques. Since 1993 Autonomous Surface Craft (ASC) have been under development at the MIT Sea Grant College Program. Hydrographic surveying was the first practical mission approached by an ASC. The ASC ARTEMIS used simple navigation and control systems and a basic recreational depth sounder to demonstrate the possiblity of performing surveys with ASC. This background led to the developments presented here. This project had two goals, the first was to develop an ASC which was better suited for hydrographic surveys than ARTEMIS. This required designing and constructing a new ASC with improved endurance, speed, payload, and stability. This goal was met with the development of the ASC ACES (Autonomous Coastal Exploration System). The development of ACES and its preliminary field tests, which provided a hydrographic survey which was 78% Class 1, are documented in this work. The second goal of this effort was to configure the new ASC for high fidelity hydrographic surveys. This required selection of new sensors to measure position, depth, tide, and the motions of the ASC. Conventional systems were evaluated and a final design was selected which incorporated the latest developments in the application of the Global Positioning System (GPS). By using GPS sensors to account for all variables except depth, ACES is able to meet the high standards of a Class 1 survey. Using an Acoutisc Doppler Current Profiler to measure depth provides ACES with a high quality and versatile sensor to employ in such surveys. This project has demonstrated the potential for ASC to be used in the field of hydrographic surveys. ACES, A system capable of providing high fidelity hydrographic surveys to meet the needs of the U.S. survey community has been designed and built. This system has matched the USACE surveys with 78% accuracy in a prototype configuration. The final high fidelity survey configuration of ACES will provide Class 1 or better surveys more cost effectively than manned survey vessels. / by Justin E. Manley. / S.M.

Thesis (S.M. and S.M. [Ocean Systems Management and Ocean Engineering])--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998. / Includes bibliographical references. / Traditional construction methods for habitability spaces in naval ships, particularly aircraft carriers, are manpower intensive and expensive. In response to decreasing defense spending, the Navy is considering methods to improve the affordability of aircraft carriers. Modular construction techniques for habitability spaces offer potential costs savings. Although cruise ship builders have utilized modular construction techniques for almost 30 years, these modules do not meet Navy survivability requirements. The Navy's Affordability Through Commonality (ATC) program is developing new joiner bulkhead systems and modular sanitary spaces to meet Navy performance requirements. However, very little is known about the cost benefits and area and weight penalties for using habitability modules in aircraft carriers. An arrangement design project was carried out on a new aircraft carrier design to quantify the cost, area, and weight benefits and penalties for using modular habitability spaces. With the assumptions made in this research, the results show that modular habitability spaces offer a 15 percent cost benefit, but suffer a 7-15 percent area penalty and 8-13 percent weight penalty. A plan for testing modular construction techniques on a new aircraft carrier is also presented. While modular construction techniques have many benefits in cruise ships, the benefits for aircraft carriers are more limited, and depend on the characteristics of the individual design. / by Eugene R. Miller III. / S.M.and S.M.[Ocean Systems Management and Ocean Engineering]

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998. / Includes bibliographical references (leaves 85-87). / When an object drops into the water a slamming load with high pressure on the body happens. Such an impact force often causes serious structure damage to the ships and offshore structures. The study of the water-entry impact problem is thus of fundamental interest and practical significance in naval architecture and marine engineering. We analytically study the water-entry problem of an arbitrary two-dimensional object. The linearized formulation of Wagner (1932) for wedges of small deadrise an­gles is adopted and extended to general body geometries with the boundary condition on the body satisfied exactly. For wedges and circular cylinders, we derive closed­form solutions by using the conformal mapping techniques for the exact solution of the boundary-value problem at any instant. The analytical solutions are confirmed by comparisons to the physical experiments and the fully-nonlinear simulation results for wedges and by comparisons to the existing experiments for circular cylinders. for arbitrary ship-like bodies, we also develop a general solution scheme based on the use of Lewis-form representation of the body geometry. It is applied to wedge and circular cylinder and agrees with the exact solutions very well. For illustration, the solutions for the case of parabolic section and a bow flare section arc also presented / by Xiaoming Mei. / S.M.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1983. / Includes bibliographical references. / by Leo Francis Ahearn Jr. / Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1983.

Massachusetts Institute of Technology. Dept. of Ocean Engineering. Thesis. 1974. Ocean E. / MICROFICHE COPY ALSO AVAILABLE IN BARKER ENGINEERING LIBRARY. / Bibliography: leaves 223-228. / Ocean E.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1984. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / by Myung Sung Suh. / M.S.