Wessman, Ernest Everett.

An existing computer simulation of a hydraulic submarine steering control system was analyzed to determine the source of its unrealistic behavior, which included verifying mathematical equations and numerical parameters, duplicating the simulation on another computer, and investigating the validity of the assumptions made in its development. Rudder turning rate and load pressure drop oscillations which were thought to be unrealistic were caused by the neglect of significant rudder moments relate...

Walsh, Raymond Michael

No description available.

Pattin, Stephen Michael.

No description available.

Moritz, Carl Arthur

No description available.

Reagan, Louis L.

No description available.

Schmieg, George D.

No description available.

Immerman, Arthur Leslie

No description available.

Bailey, Daniel L.

No description available.

Bedell, Kevin F.

The feasibility of using submarine-recorded acceleration and navigational data to detect deep convection in the ocean was explored by comparing actual submarine observations of vertical velocity with vertical velocity of a hypothetical submarine driven through a field of oceanic turbulence predicted by Large-Eddy Simulation (LES). The actual submarine data included time series of three-dimensional acceleration and submarine velocity from the inertial navigation system (INS), gravity and keel dep...

Sue, Langford Phillip

Tsunami are a fascinating but potentially devastating natural phenomena that have occurred regularly throughout history along New Zealand's shorelines, and around the world. With increasing population and the construction of infrastructure in coastal zones, the effect of these large waves has become a major concern. Many natural phenomena are capable of creating tsunami. Of particular concern is the underwater landslide-induced tsunami, due to the potentially short warning before waves reach...

Babaoglu, Orhan K.

Approved for public release; distribution is unlimited. / The purpose of this thesis is to linearize given non-linear differential equations and design a complete automatic control system for the three dimensional motions of a submarine. Automatic control systems are designed using a steady state decoupling scheme for vertical and horizontal motion. Both designs are simulated using the Dynamic Simulation Language (DSL) for both linear and non-linear models and compared. Cross-coupling effect bet...

Tolliver, John V.

Approved for public release; distribution in unlimited. / Requirements for submarine periscope depth operations have been increased by integration with carrier battle groups, littoral operations, and contributions to joint surveillance. Improved periscope depth performance is therefore imperative. Submarine control personnel rely on a large number of analog gauges and indications. An integrated digital display system could enhance the ergonomics of the human control interface and display additio...

Wells, Michael Shawn

Approved for public release; distribution is unlimited / The Active Sonobuoy Model simulates a single aircraft attempting to detect and maintain contact on a single submarine. The submarine executes a pre-determined sequence of maneuvers upon counter-detection of the active sonobuoys. Under present methodology these maneuvers are not situation dependent, and do not provide an accurate depiction of reality. The purpose of this thesis is to improve the level of reality of the Active Sonobuo...

Halvorson, Jeffrey A

Approved for public release; distribution is unlimited / The current NPSNET submarine simulator interface is not a viable training tool because it utilizes a control panel which rims as a separate process and includes three separate tabs, one each for the Officer of the Deck, Helm, and Weapons Officer. Besides lacking immersion qualities, most of the control icons and prototypes are not functional. Our approach was to mount human entities to the submarine that can control and maneuver the submar...

Hu, Hongrui, 1977-

This dissertation details the development of a block model for the movement of submarine slides with emphasis on possible hydroplaning. Unlike previous models, the block model simulated the mechanism of hydroplaning by monitoring the contact condition between the bottom surface of the slide mass and the underlying ground. The effect of hydroplaning on the movement of the slide mass is considered by changing the forces applied on the slide mass by the underlying ground according to the contact ...

Sawyer, Derek Edward

Submarine landslides retrogressively fail from intact material at the headwall and then become fluidized by strain weakening; the final deposits of these flows have low porosity, which controls their character in seismic reflection data. Submarine landslides occur on the open slope and also localized areas including margins of turbidite channel-levee systems. I develop and quantify this model with 3-D seismic reflection data, core and log data from Integrated Ocean Drilling Program Expedition 30...

Spurgin, Jessica Michelle

Flow dynamics around a downwelling submarine canyon were analyzed with the Massachusetts Institute of Technology general circulation model. Blanes Canyon (Northwest Mediterranean) was used for topographic and initial forcing conditions. Fourteen scenarios were modelled with varying forcing conditions. Rossby number and Burger number were used to determine the significance of Coriolis acceleration and stratification (respectively) and their impacts on flow dynamics. A new non-dimensional paramete...

MacNeill, Aaron

Submarine power production installations use the power of the ocean to generate renewable energy for the population to use. To bring this electricity back to land, use of electrical cables is required. The choice of cable will affect both the quality of received power and the security of the transmission line. To find the inductance and capacitance of these submarine transmission lines, a study of the electric and magnetic fields that are produced due to the power flow on these cables must be p...

MacIsaac, Kevin Gregory

The larger pelagic crustacean fauna of the Gully submarine canyon is described for the first time, based on three annual summer surveys. The larger Crustacea are a significant part of the Gully fauna, and are dominated by cold temperate species, in particular the northern krill Meganyctiphanes norvegica and the decapod Sergestes arcticus. In all, at least 69 species were collected from the surface to bathypelagic depths, with seventeen being new Canadian records. With the exception of M. norvegi...

Luchs, James Kenneth

CIVINS / This thesis develops a 3-degree of freedom submarine drydock blocking system computer aided design package. Differential equations of motion are developed to take into account high blocking systems, wale shores, and side block cap angles. The computer program is verified by a case study involving the earthquake sliding failure of the USS Leahy (CG-16). A parametric study is conducted to determine the effects of wale shores, isolators, and block stiffness and geometry variations on syste...

Mette, James Allen Jr.

No description available.

Papanikolaou, Stavros I.

The problem of dynamic stability of submersible vehicles in the dive plane is examined utilizing bifurcation techniques. The primary mechanism of loss of stability is identified in the form of generic Hopf bifurcations to periodic solutions. Stability of the resulting limit cycles is established using center manifold approximations and integral averaging. The hydrodynamic coefficients are calculated using existing semi-empirical methods. Parametric studies are performed with varying vehicle geom...

Cooper, Ross E., Hughes, Wayne P.

(U) The problem of convoy defense against a mixed threat of conventional and nuclear submarines is posed. A general, conceptual method of solution is offered from which a simple analytical model is constructed. Use of the model for obtaining optimal policies of screening force disposition is demonstrated. Underlying assumptions of the model and related tactical problem areas are discussed and analyzed.

Handford, Richard C.

No description available.

Timmerman, Michael Jay.

This research was aimed at improving the genetic algorithm used in an earlier anti-submarine warfare simulator. The problem with the earlier work was that it focused on the development of the environmental model, and did not optimize the genetic algorithm which drives the submarine. The improvements to the algorithm centered on finding the optimal combination of mutation rate, inversion rate, crossover rate, number of generations per turn, population size, and grading criteria. The earlier simul...

Bednarczyk, Adalbert A.

No description available.

Andrew, Frederick Morgen

No description available.

Tiago Rodrigues

No description available.

Le Souëf, Kate Elizabeth

The Gully, Nova Scotia (44 degrees N) is unique amongst studied submarine canyons poleward of 30 degrees due to the dominance of the diurnal (K₁) tidal frequency, which is subinertial at these latitudes. Length scales suggest the diurnal frequency may be resonant in the Gully. A physical model of the Gully was constructed in a tank and tidal currents were observed using a rotating table. Resonance curves were fit to measurements in the laboratory canyon for a range of stratifications, background...

The concept of the submarine equilibrium profile has long been established. / This dissertation first proposes a conceptual model based on the well established concept. Then it proposes an analytical model with a differential equation which is based on the Airy wave theory and the wave-induced asymmetrical onshore/offshore sediment particle movement proposed by Cornaglia. / A "SIMPLEX" non-linear regression algorithm was used to write a computer program "SIMPYA" in GWBASIC. The computer program ...

Schrecker, Arnold Malan

Bibliography: pages 193-205. / In Part I theoretical aspects of hydrodynamic forces on immersed solids are considered. Part II contains a chronological review of research projects, laboratory as well as ocean experiments, which have been carried out since 1950. In Part III the recommended procedures, which emerge from Part. II, are applied to calculate wave forces acting on the proposed Green Point outfall sewer which is to serve the central city area of Cape Town. The results are discussed and ...

Tully, John M.

Thesis (M.A. in National Security Affairs) Naval Postgraduate School, June 2001. / Thesis adviso(s): Yost, David S. "June 2001". Includes bibliographical references. Also available online.

Wallin, Steven Russell

No description available.

Dziubinschi, Gabriela.

Submarine cable systems are a vital and expanding part of the world wide telecommunication network. The systems are laid in the ocean using a cable ship. During the deployment of a submarine cable, the cable ship has only limited information about the behaviour of the cable once it leaves the vessel and begins its descent to the seabed. The present thesis studies the cable dynamics and control during laying operations. / The cable dynamics is modeled using the continuum approach. Using the model...

Arthur, William Craig, School of Mathematics, UNSW

The continental shelf off South Australia is incised by some of the largest known submarine canyons. Extensive observations of submarine canyons in other parts of the world have shown submarine canyons can result in locally persistent upwelling regions. Along the southern coastline, westward slope currents including anticyclonic eddies and the Flinders Current (FC) can result in favourable conditions for upwelling in the vicinity of these canyons. Little data is available to describe the FC and ...

Serwich, Thomas Gregory

No description available.

Leary, John A.

No description available.

Hutton, Rodney E.

Submarine acquisitions are on the rise throughout Asia. This thesis examines the national motivations behind this trend in three cases: India, China and Japan. Four hypotheses - focusing on national security, factional interests, technological momentum and institutional theory - are utilized in order to gain insight into the decision making process surrounding submarine acquisitions. The development of a conventional submarine fleet is strongly influenced by national security issues. The remaini...

Howes, Brian Thomas

No description available.

Tuggle, Ralph Edward

No description available.

Thuné, Sebastian

The best way to save money in a submarine design project is to, in an as early stage as possible, be able to find errors in a design or construction. A powerful method to find such errors is to put the design through rigorous testing in simulation software. This project has created a simulation program for a submarines cruising fully submerged. The software is using well-known and established equations of motion (EOM’s) that has been developed through the years. These equations describe the forces...

Larsson, Joel, Forsberg, David

Humanity has been fishing for a long time, more specifically underice with nets, this could be a lot more efficient if it could beautomated in any stage of the procedure. The project aim is toconstruct an automated system for assisting in net fishing under ice.A navigation system using a GPS module, an IMU and radio transceiverwas designed, constructed and implemented on a car for testing. Theresult was a system that could navigate to either a predeterminedpoint or return to a point saved by the...

Petermann, Eric

The discharge of groundwater into surface water bodies is a hidden, but significant pathway for the input of water and matter into lakes, rivers, estuaries and the coastal sea. Since groundwater is most often characterized by higher levels of nutrients or heavy metals, its discharge has often a crucial effect on the surface water body´s chemistry and the ecosystem health as well as on the related ecosystem service supply. For instance, groundwater-derived nutrient inputs are essential to fuel pr...

Skene, Kenneth Ian

No description available.

Bacon, Daniel Keith.

Thesis (M.S. in Computer Science) Naval Postgraduate School, September 1995. / Thesis advisor(s): Michael J. Zyda, D.P. Brutzman, John S. Falby. "September 1995." Bibliography: p. 83-84. Also available online.

Carlberg, Henrik

Oil and gas production in the Arctic poses several new challenges that require new solutions. One such is the use of manned submarines for light intervention tasks. The submarine is completely independent of the surface conditions while adequately submerged, which is their main advantage in the Arctic. This report presents the initial design of an intervention submarine intended for the Shtokman gas condensate field. The vessel is able to perform structural inspection with an ROV and replace sma...

Hollister, John Edward

No description available.

Bower, Michael J.

No description available.

Tucker, James Francis

No description available.

Hoffman, James L.

No description available.