From underwater boat to submarine – The development of the Swedish submarine service 1945-1960 The scope of this essay is the development of the Swedish submarine service during the period 1945-1960. The aim is to answer the following questions: - What kind of new technology did Sweden acquire when salvaging the German type XXI submarine off Gothenburg at the end of World War II? - In what respect did this technology differ from that of the Royal Swedish Navy and did it subsequently contribute to the tactical and operational development? - What tactical and operational development was accomplished between 1945-1960? The timeframe, 1945-1960, was chosen since this is when the analysis of the salvaged type XXI submarine and related effects was conducted. Furthermore, it is also during this time that the Swedish submarine service is beginning to evolve as a result of the new knowledge mentioned above and the experiences made by both the allies and the Germans during World War II. The theoretical framework primarily refers to the theories on naval warfare by Sir Julian Corbett. Here the “Fleet in being” and his methods for viewing command have been deemed to be of primary interest, also the definition of “basic capabilities” applied by the Swedish Armed Forces is referred to in order to simplify certain matters to the reader. In conclusion, the technology acquired from the Germans provided Sweden not only with new actual technology but also a preview of the coming modern submarine and underwater warfare. The new technology and the experiences were implemented into the submarine service contributed to the fact that the Swedish submarines over a period of ten years developed from being underwater boats to actual submarines and subsequently contributed to the Swedish naval warfare capability during the Cold War.

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).

Thesis--School of Advanced Airpower Studies, 1992. / Shipping list no.: 1998-0921-M. "October 1993." Includes bibliographical references. Also available via Internet from the Air University Press web site. Address as of 10/10/03: http://aupress.au.af.mil/SAAS%5FTheses/Chilstrom/chilstrom.pdf; current access is available via PURL.

Thesis (M.S.)--San Diego State University. / Includes bibliographical references (leaves [61]-65).

Thesis (Master's)--Scott Polar Research Institute, University of Cambridge, 1989. / Includes bibliographical references (leaves 86-92).

Current rates of technological advancement continue to translate into changes on our battlefields. Aerial robots capable of gathering reconnaissance along with unmanned underwater vehicles capable of defusing enemy minefields provide evidence that machines are playing key roles once played by humans within our military. This thesis explores one of the major problems facing both commercial and military UUVs to date. Successfully navigating in unfamiliar environments and maneuvering autonomously to avoid obstacles is a problem that has yet to be fully solved. Using a simulated 2-D ocean environment, the work of this thesis provides results of numerous REMUS simulations that model the vehicle's flight path over selected sea bottoms. Relying on a combination of sliding mode control and feedforward preview control, REMUS is able to locate obstacles such as seawalls using processed forward look sonar images. Once recognized, REMUS maneuvers to avoid the obstacle according to a Gaussian potential function. In summary, the integration of feedforward preview control and sliding mode control results in an obstacle avoidance controller that is not only robust, but also autonomous.

Upper layer temperature in the western Philippine Sea near Taiwan was sampled using a coastal monitoring buoy with fifteen themistors attached from July 28-August 7, 2005. Internal waves and internal solitons were identifed during the empirical orthogonal function analysis. Without the IW and IS, the power spectra, structure functions, and singular measures (respresenting the intemittency) of the temprature field satisfy the power law with multi-scale characteristics at all depths. The IW does not change the basic characteristics of the multifractal structure. However, the IS changes the power exponent of the power spectra drastically, especially in the low wave number domain. It breaks down the power law of the structure function and increases the intermittency parameter. The physical mechanisms causing these different effects need to be explored futher. The Comprehansive Acoustic Simulation System was applied to determine how the IS affect the mines detection by computing the transmission loss (TL) and the ray traces of rand-dependent and range independent cases during the IS period. The maximum TL difference is 20 dB. As a result, the mine detection probability will dramatically be reduced to 1% of the original detection probability.

Immediately after the outbreak of the World War, Great Britain, France and Japan cut the German submarine cables which were situated in the different oceans of the world. The study of the submarine cables during the World War and its aftermath is a complex problem. To understand the post-war negotiations, previous international agreements, treaties and the ownership, operation and financing of the cables must be understood.

In this Thesis work the development of a Software Simulation that allows closest offer at training to the reality for sonar operator’s personal in formation and described System sets out; with the objective to present the operability on board to Sonar device of the submarine units, as well as interaction with existing simulation modules inside the simulator Attack of Submarine Force of the Navy military of Peru, Located at the Submarine School. The Thesis is divided in four parts: the Introduction to the proposed subject and its problematic; Theoretical Frame that corresponds to variables that include the reach of this work; the State of the Art where a case in individual of a Sonar Simulator Software constructed under another programming language is exposed, which does not have similarity with electronic equipment sonar on board of the submarine units; finally the exposition of a development proposal, improvement and execution of a sonar simulator software that fulfills the functionality of the original electronic equipment on board. The hypothesis is in demonstrating that it’s possible to develop a sonar simulator software that allows to carry out functionalities of the original electronic equipment. Proven this throughout the Thesis, the objective is obtained: to demonstrate that it’s possible to construct a sonar simulator software that shows the contacts, generate the noise corresponding, sent the data necessary to other simulation modules, and simulating the Test containing in the original equipment. / En este trabajo de Tesis se propone el desarrollo de un Software de Simulación que permita brindar un entrenamiento más cercano a la realidad al personal de sonaristas en formación y calificado; con el objetivo de dar a conocer la operabilidad del sonar integrado a bordo de las unidades submarinas, así como la interacción con los módulos de simulación existentes en simulador de ataque de la Fuerza de Submarinos de la Marina de Guerra del Perú, ubicado en la Escuela de Submarinos. La Tesis se divide en cuatro partes: la Introducción al tema propuesto y su problemática; el Marco Teórico que corresponde a las variables que engloban el alcance de este trabajo; el Estado del Arte donde se expone un caso en particular de un software de simulación de sonar desarrollado bajo otro lenguaje de programación, el cual no tiene similitud con el sonar existente a bordo de las unidades submarinas; finalmente el planteamiento de una propuesta de desarrollo, mejoramiento y ejecución de un sistema simulador de sonar que cumpla con las funcionalidades del equipo de a bordo y se integre al sistema de simulación existente. La hipótesis está en demostrar que es posible desarrollar un software de simulación del sonar que permita realizar las funcionalidades que contiene el equipo original. Probado esto a lo largo de la Tesis, se logra el objetivo: demostrar que es posible construir un software simulador de sonar que muestra los contactos, genere el ruido sintético de las hélices, envié los datos necesarios a los otros módulos de simulación, y simule las pruebas Test que contiene el equipo original.