Sea Technology

JUN 2014

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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www.sea-technology.com June 2014 / st 63 these conditions is diffcult and places very high demands on operators and the equipment they use. Maine Wind Blade Challenge Student Design Competition More than 200 students competed in the sixth annual Maine Wind Blade Challenge to design the most effcient wind blade systems to generate elec- tricity, with the Baxter team coming out on top. The Maine Wind Blade Challenge was developed by Maine Composites Alliance (MCA) in partnership with the Maine Ocean & Wind Industry Initia- tive (MOWII), with support from the University of Maine College of Engi- neering and the Advanced Structures and Composites Center, to inspire stu- dent exploration of alternative energy and advanced materials. The Wind Blade Challenge part- ners high school teams with Maine advanced composites manufacturers to research, design and manufacture model wind blades. Each team must compete against other teams to generate the most en- ergy over a two-minute period, and make presentations illustrating the research, design and engineering pro- cesses. REMUS 100 AUV Surveys D-Day Wreckage A mission off the coast of South Devon, England, has surveyed two U.S. Landing Ship Tanks (LSTs) that were torpedoed and sunk during the D-Day rehearsal Exercise Tiger on April 28, 1944. Using state-of-the-art AUV technology to collect data from the wreckage, the mission has produced the frst high-defnition sonar images of this World War II tragedy. This was the frst time in history that an AUV had surveyed the area. The mission, which was executed by Hydroid, Inc. (Pocasset, Massachu- setts), with additional data provided by the Royal Navy's Maritime Auton- omous System Trials Team (MASTT), commemorates the 70th anniversary of Exercise Tiger. A tragic but largely unknown mili- tary operation, Exercise Tiger was a D- Day rehearsal for the invasion of Nor- mandy's Utah Beach. The exercise took place off the southern English coast and resulted in the loss of nearly 1,000 American servicemen—more than the number of deaths at the actual inva- sion of Utah Beach. The REMUS 100, a Hydroid AUV was used to secure close proximity, high-quality side scan and wide-swath interferometric bathymetric multibeam sonar images of the two LST wreck sites. The data show that both LSTs are about 50 meters below the surface and reach 6 to 8 meters above the seafoor. The REMUS 100 also discovered an object of interest close to the shore which may hold signifcance in rela- tion to Exercise Tiger. An effort to iden- tify this object is currently underway by the Royal Navy. While Hydroid operated in the Eng- lish Channel about 30 miles out to sea, MASTT focused on the waters just off Slapton Sands where the Exercise Tiger beach landing took place. The infor- mation collected by MASTT's REMUS 100 was an important supplement to the efforts of the Hydroid team. To commemorate the 70th anniver- sary of Exercise Tiger, Hydroid and the Royal Navy will donate images that were obtained from this mission to the U.K. National Archive and local me- morials. n JUN2014.indd 63 6/4/14 12:15 PM

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