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A concept was developed by the Seabasing Innovation Cell within the Center for Innovation in Ship Design (CISD) at the Naval Surface Warfare Center Carderock Division (NSWCCD). The study was undertaken during February–May 2003 with funding provided by the Office of Naval Research (ONR). The concept was developed in summer 2003 with further CISD funding and has been chosen for the 2004 Senior Year Design, Build and Test project by Florida Atlantic University’s (FAU) Ocean Engineering Department. The concept, known as the Deep Water Stable Craneship (DWSC) consists of two entities, a catamaran craneship and a detachable spar, which when connected form a self-deploying, open ocean capable trimaran. The spar can be rotated through 90 degrees, from horizontal to vertical, using seawater ballast. When vertical, partial de-ballasting ‘lifts’ the catamaran clear of the water surface allowing the system to operate as a spar and take advantage of the superior seakeeping afforded by the small waterplane area. The concept was inspired by the “ONR owned” and “Scripp’s Institute operated” FLIPSHIP, and was developed as a potential solution to the Seabasing goal of transferring containerized cargo at sea between large and small vessels in seastate four (significant wave-heights 1.25–2.5m). Current crane operations at-sea are limited to seastate two (significant wave-heights 0.1–0.5m), largely due to pendulation of the load. This paper presents the development of the concept, its performance and alternative uses. In addition, a 1:15 scale ‘demonstrator’ is discussed as is a proposal for a FLIPSHIP-II.

Fuel cell technologies provide clean and efficient power solutions for both stationary and mobile applications. For shipboard applications, most studies published so far have focused on ship service power or on propulsion power for small vessels with moderate power requirements. Using a military sealift vessel as the platform, this project aims at investigating the implications of implementing fuel cells as the primary power source on a large military cargo ship. A notional solid oxide fuel cell (SOFC) module is proposed and the implications of the technology on fuel savings and machinery arrangements are analyzed. The study shows that, by using a hybrid SOFC-GT (gas turbine) system, high system efficiency can be achieved through combined power-heat-steam generation within the constraints of the given machinery space. The modular features of the fuel cell systems and electrical components are also exploited for flexible machinery arrangements. This paper documents the quantitative analysis of the fuel cell-powered sealift vessel, provides detailed space arrangement schematics for the proposed concept, and identifies the technology gaps and future development opportunities to pursue the next generation of clean and efficient military sealift vessels or commercial cargo ships.

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)3 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORTChief of Naval Research Ballston Centre Tower One 800 North Quincy Street Arlington, VA 22217-5660 NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENT Unrestricted Distribution SUPPLEMENTARY NOTES ABSTRACTA study to investigate the utility of seaplanes to support an offshore military Sea Base has been undertaken by the Center For Innovation In Ship Design. The potential use and importance of seaplanes for future sea-based military missions are discussed. The research outlines the history of seaplane development, their different modes of operation and associated enabling technologies. Parametric data collected on seaplanes has been populated into a database, presented and analyzed, leading to defining initial seaplane sizing requirements. Current technology boundaries and technical issues that need further research, including those related to integrating seaplanes within a Sea Base environment have also been identified. Issues such as rough water operations, mooring and beaching have been considered, along with new methods to take advantage of existing technology to operate in high sea states. Potential seaplane design concepts are presented, with recommendations for investment in particular seaplane technologies, such as lightweight materials, spray reduction designs, and novel landing/beaching gear. SUBJECT TERMS