Thesis (doctoral)--Universität, Dortmund, 1999. / Slightly rev. new edition.

Approved for public release, distribution unlimited / The Anti-Submarine Warfare screen design simulation is a program that provides a model for operations in anti-submarine warfare (ASW). The purpose of the program is to aid ASW commanders, allowing them to configure an ASW screen, including the sonar policy, convoy speed, and the number of ships, to gain insight into how these and other factors beyond their control, such as water conditions, impact ASW effectiveness. It is also designed to be used as a training tool for ASW officers. The program is implemented in Java programming language, using the Multi Agent System (MAS) technique. The simulation interface is a Horizontal Display Center (HDC) which is very similar to a MEKO200 class Frigate Combat Information Center's (CIC) HDC. The program uses Extensible Markup Language (XML) files for reading data for program scenarios; parameters are initialized before each run time begins. The simulation also provides all the output data at the end of run time for analysis purposes. The program user's goal, and the purpose of the program, is to decrease the number of successful attacks against surface vessels by changing the configuration parameters of the ASW screen, to reflect sonar policy, convoy speed or number of ships in the simulation. Ongoing use of the program can provide data needed to anticipate required operational needs in future ASW situations. / Lieutenant Junior Grade, Turkish Navy

This manuscript describes a methodology to combine environmental models, acoustic signal predictions, statistical detection models and operations research to form a framework for calculating and communicating performance. This methodology has been applied to undersea target detection systems and has come to be known as Performance Surface modeling. The term Performance Surface refers to a geo-spatial representation of the predicted performance of one or more sensors constrained by all-source forecasts for a geophysical area of operations. Recent improvements in ocean, atmospheric and underwater acoustic models, along with advances in parallel computing provide an opportunity to forecast the effects of a complex and dynamic acoustic environment on undersea target detection system performance. This manuscript describes a new process that calculates performance in a straight-forward "sonar-equation" manner utilizing spatially complex and temporally dynamic environmental models. This performance model is constructed by joining environmental acoustic signal predictions with a detection model to form a probabilistic prediction which is then combined with probabilities of target location to produce conditional, joint and marginal probabilities. These joint and marginal probabilities become the scalar estimates of system performance. This manuscript contains two invited articles recently accepted for publication. The first article describes the Performance Surface model development with sections on current applications and future extensions to a more stochastic model. The second article is written from the operational perspective of a Naval commanding officer with co-authors from the active force. Performance Surface tools have been demonstrated at the Naval Oceanographic Office (NAVOCEANO) and the Naval Oceanographic Anti-Submarine Warfare (ASW) Center (NOAC) in support of recent naval exercises. The model also has recently been a major representation for the "performance" layer of the Naval Meteorological and Oceanographic Command (NAVMETOCCOM) in its Battlespace on Demand strategy for supporting the Fleet with oceanographic products.

Thesis (M.S. in Applied Science (Signal Processing))--Naval Postgraduate School, June 2004. / Thesis advisor(s): Lawrence J. Ziomek. Includes bibliographical references (p. 47). Also available online.

Thesis (M.S., operations research)--Naval Postgraduate School, March 2008. / Title from title screen (viewed Oct. 9, 2008). Thesis Advisor(s): Pilnick, Steven E. "March 2008." "ADA479828"--DTIC URL. Includes bibliographical references (p. 93-95).

Thesis (M.S., operations research)--Naval Postgraduate School, March 2008. / Thesis Advisor(s): Pilnick, Steven E. "March 2008." Includes bibliographical references (p. 93-95).

No description available.

Made available in DSpace on 2016-06-02T19:14:59Z (GMT). No. of bitstreams: 1 5410.pdf: 2286811 bytes, checksum: 5992c36bb680140d19c9b5e348cfea97 (MD5) Previous issue date: 2013-03-20 / Financiadora de Estudos e Projetos / This work aims to analyze the technological modernization of the Brazilian Navy in the period between 1942 and 1970. Despite starting the Second World War without conditions of defending the country, the Brazilian Navy has modernized with American support, equipping it with modern anti-submarine equipment within the concept of hemispheric defense. At the end of the conflict and start of the Cold War, U.S. politics for the Latin America changed, and the Brazilian Navy stopped receiving modern military equipment from that country. Nevertheless, most Brazilian officers continued supporting the principles of the hemispheric defense, which mean subordination, strategic and intellectual, to the U.S. Navy. For much of the following decades, despite the changes in the foreign policy and investments in scientific and technological research in Brazil, the Brazilian Navy continued subordinated to the concept of hemispheric defense, with an obsolete fleet and unable to get modern ships. In late 1960s, the Brazilian Navy begins to face difficulties in acquiring modern weapons because of changes in the U.S. politics, culminating in the acquisition of British frigates, which despite having great emphasis on anti-submarine warfare, mark the recovery of shipbuilding in Brazil, the beginning of the withdrawal of the material and intellectual dependence on the U.S. and a major technological leap in the Brazilian Navy. / Este trabalho tem como objetivo analisar a modernização tecnológica da Marinha Brasileira no período entre 1942 e 1970. Apesar de iniciar a Segunda Guerra Mundial sem condições de defender o país, a Marinha se modernizou, com recursos norteamericanos, equipando-se com moderno equipamento antissubmarino, dentro da concepção de defesa hemisférica. Ao final do conflito e início da Guerra Fria, a política dos EUA para a América Latina mudou, e a Marinha parou de receber equipamentos militares modernos daquele país. Apesar disso, a maioria dos oficiais continuou apoiando os princípios de defesa hemisférica, o que significava a subordinação, estratégica e intelectual, à marinha norte-americana. Durante grande parte das décadas seguintes, a despeito das mudanças na política externa e investimentos na pesquisa científica e tecnológica no Brasil, a Marinha continuou subordinada à concepção de defesa hemisférica, com uma frota obsoleta e sem conseguir navios modernos. Já no final dos anos de 1960, a Marinha começa a enfrentar dificuldades na aquisição de armamentos por mudanças na política norte-americana, que culminam na aquisição de fragatas britânicas, que apesar de ainda terem grande ênfase na guerra antissubmarino, marcam a retomada da construção naval no país, o início do afastamento da dependência material e intelectual dos EUA e num importante salto tecnológico na Marinha.

Syftet med denna studie är att undersöka huruvida den tyska ubåtskrigföringen under andra världskriget använde sig av sjökrigsmetoder som beskrevs av Sir Julian Corbett i början av 1900-talet. För att testa Corbetts teorier studeras slaget om Atlanten 1939 – 1945 som ett empiriskt fall. Frågeställningen i denna rapport är: Vilka likheter och/eller skillnader finns mellan Sir Julian Corbetts sjökrigsmetoder och det tyska ubåtsvapens agerande under slaget om Atlanten? Metoden som används för denna undersökning är en komparativ metod där slaget om Atlanten studeras som ett fall. Resultatet visar att det finns en del likheter men också skillnader mellan tyskarnas ubåtskrigföring och Corbetts teorier. Corbett menar att syftet med all sjökrigföring är att alltid direkt eller indirekt säkra ett sjöherravälde eller att hindra motståndaren från att säkra den. Det tyska ubåtsvapnet försökte aldrig att etablera ett sjöherravälde utan valde att bestrida och neka britterna ett sådant. Detta gjorde de genom Corbetts metoder fleet in being, nålsticksoperationer och sjöfartskrig. Resultatet visar på en skillnad i metod gällande sjöfartskrig då Corbett menar att den effektivaste metoden är att anfalla fiendens hamninlopp och terminaler medan det tyska ubåtsvapnet bedrev sjöfartskrig ute på öppet hav med goda resultat. / The purpose of this study is to examine whether the German submarine warfare during the World War II used the principles of maritime strategy described by Sir Julian Corbett during the early 1900s. The Battle of the Atlantic will be used as an empirical case to test Corbett’s theories. The issue addressed in this report: What similarities and/or differences exist between Sir Julian Corbett’s maritime strategy and the German submarine actions during the Battle of the Atlantic? The method used for this study is a comparative method and the Battle of the Atlantic is studied as a case. The result shows that there are some similarities but also differences between the German submarine warfare and Corbett's theories. Corbett believes that the purpose of all naval warfare is to always directly or indirectly secure a sea command or to prevent the opponent from securing it. The German submarine force never tried to establish a sea command but chose to deny the British Navy and establishment of one. They did this by Corbett methods fleet in being, minor counter attacks and attack of trade. The results show a difference in the approach regarding maritime war. Corbett believes that the most effective approach is to attack the enemy's harbour and terminals while the German submarine force conducted maritime war on the high seas with good results.

The use of magnetometers combined with unmanned aerial vehicles (UAVs) is an emerging market for commercial and military applications. This study presents the methodology used to magnetically characterize a novel fixed-wing vertical take-off and landing (VTOL) UAV. The most challenging aspect of integrating magnetometers on manned or unmanned aircraft is minimizing the amount of magnetic noise generated by the aircraft’s onboard components. As magnetometer technology has improved in recent years magnetometer payloads have decreased in size. As a result, there has been an increase in opportunities to employ small to medium UAV with magnetometer applications. However, in comparison to manned aviation, small UAVs have smaller distance scales between sources of interference and sensors. Therefore, more robust magnetic characterization techniques are required specifically for UAVs. This characterization determined the most suitable position for the magnetometer payload by evaluating the aircraft’s static-field magnetic signature. For each aircraft component, the permanent and induced magnetic dipole moment characteristics were determined experimentally. These dipole characteristics were used to build three dimensional magnetic models of the aircraft. By assembling the dipoles in 3D space, analytical and numerical static-field solutions were obtained using MATLAB computational and COMSOL finite element analysis frameworks. Finally, Tolles and Lawson aeromagnetic compensation coefficients were computed and compared to evaluate the maneuver noise for various payload locations. The magnetic models were used to study the sensitivity of the aircraft configuration and to simultaneously predict the effects at potential sensor locations. The study concluded by predicting that a wingtip location was the area of lowest magnetic interference. / Graduate