There are prominent unmanned undersea vehicle (UUV) systems existing in the commercial marketplace today, but these systems have a relatively small role and presence in U.S. Navy application. This thesis suggests what existingcommercially available UUV system architectural attributes could be used now in U.S. Navy applications. After a survey of multiple existing commercial UUV systems, five of the prevalent systems in the marketplace were selected for analysis and comparison of their system architecture. This thesis included a comprehensive architectural analysis on seven specific architectural attributes of these UUV systems. Other UUV systems were also analyzed to support specific system architecture discussion. Major architecture considerations were made by the UUV system designers and likely drivers of existing system attributes were discussed as well as the benefits and disadvantages of these system attributes. Finally, based on the material and findings of the thesis, recommendations for a notional UUV system design and architecture for the U.S. Navy was presented.