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<p>The United States Navy owns four salvage ships and four towing ships that will reach the end of their 40-year life  expectancy in 2019. The program manager for these vessels has a set of desirable performance requirements for a new ship class,  T-ARS(X), which combines the capabilities from both the salvage and towing ship classes. The need to develop a recapitalization strategy based on either designing a new ship class based on these desirable requirements or purchasing commercial capabilities  based on the salvage and towing community's needs is paramount. Meanwhile, the Department of Defense (DoD) has shifted  defense planning from the specific service requirements generating system (RGS) acquisition to the Joint Capabilities Integration  and Development System (JCIDS) approach that focuses on requirements generation based on customer need. This thesis explores  how to use systems architecting principles in the context of model-based systems engineering (MBSE) to incorporate the  capabilities needed for towing and salvage recapitalization into a cohesive framework for developing the T-ARS(X) requirement  specification. The CORE design tool is used to implement the MBSE architecting process using the Naval Architecture Elements  Reference Guide (NAERG) and standardized operational tasks to create DODAF v1.5 products from system models. The  requirements generated from the architecture model are compared with the current, combined towing and salvage-capable  commercial platforms for analysis. Based on the methodology presented, the towing and salvage community now has the basis to  perform a capabilities-based analysis of alternatives (AoA) for the T-ARS(X) recapitalization.
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<br>Subjects: Naval architecture; Costs; Salvage; Decision making; Tugboats</div>
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Addington, Christopher D.</div>
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