On May 15th of this year, I provided you with preliminary findings from the Congressional Budget Office (CBO) study of issues related to submarine programs now under review by the Congress. In that earlier letter, I addressed the near-term savings that would result from a decision not to fund completion of the third Seawolf submarine. After briefly reviewing those savings, the accompanying atta...

Simulations of self-propelled submerged bodies have been conducted in idealized environments with simple environmental geometries and stratifications. The focus of those simulations was on improving the submarine performance, including reduced drag, less vortex production, improved maneuverability and greater speed. Thus, many of the simulations focused on the near field and on complex, realist...

On May 15th of this year, I provided you with preliminary findings from the Congressional Budget Office (CBO) study of issues related to submarine programs now under review by the Congress. In that earlier letter, I addressed the near-term savings that would result from a decision not to fund completion of the third Seawolf submarine. After briefly reviewing those savings, the accompanying atta...

Flexible and scalable networking solutions are required to offer more efficient bandwidth allocation and increased connectivity in submarine networks. In this regard, filterless optical networks based on agile edge nodes equipped with coherent transceivers and passive broadcast-and-select nodes are promising cost-effective options which allow for more flexible capacity allocation and resource o...

On May 15th of this year, I provided you with preliminary findings from the Congressional Budget Office (CBO) study of issues related to submarine programs now under review by the Congress. In that earlier letter, I addressed the near-term savings that would result from a decision not to fund completion of the third Seawolf submarine. After briefly reviewing those savings, the accompanying atta...

Submarine confinement is a key element in most underwater communication application. Acoustic communication of movable submarine networks face with many unmatched inquisitive like long arch, high communication power consumption and convergence mobility. Unrushed signal enlargement allows multiple packets to coordinate travel through the submarine channel, which is harsh to improve the overall t...

This paper provides an overview of the CLAM project, which aims at developing a collaborative embedded monitoring and control platform for submarine surveillance by combining cutting edge acoustic vector sensor technology and 1D, 2D, 3D sensor arrays, underwater wireless sensor networks protocol design, advanced techniques for acoustic communication, new solutions for collaborative situation-aw...

Meltwater from the Greenland Ice Sheet often drains subglacially into fjords, driving upwelling plumes at glacier termini. Ocean models and observations of submarine termini suggest that plumes enhance melt and undercutting, leading to calving and potential glacier destabilization. Here we systematically evaluate how simulated plume structure and submarine melt during summer months depends on r...

Successful submarine operations—those that accomplish the mission while maintaining security and safety—depend on numerous factors. Among the most critical elements driving success are the effectiveness of team behavior and the ability to understand when this behavior breaks down such that this degradation can be mitigated or avoided. While underway, submarine Commanders and other leaders must ...

When tasked with the development of a large and complex system of systems it is necessary that a project operates according to current best practice in all domains including systems engineering. These practices have been documented by organisations such as INCOSE and the International Organisation for Standardisation (ISO). Model-based systems engineering (MBSE) is currently considered a best p...