Sea Technology

DEC 2017

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

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Page 33 of 52 December 2017 / st 33 & LINEAR For mor building amplifiers to drive reactive loads. Model S16-20 A A 20% duty 35 x 31.5 x 35.5 inches; 985 lbs. isit our 7263 Engineer Rd., San Diego, CA 92111-1493 (858) 571-1111 FAX (858) 571-0188 Copyright 2017 veloping a pressure-tolerant lithium- sulphur (Li-S) battery that's capable of powering autonomous vehicles to ocean depths exceeding 6,000 m. The cells can withstand the extreme pressure of 664 bars at a temperature of 4° C. They achieved 289 Wh/kg at a pres- sure of 450 bars. The gravimetric energy density of the complete battery is 184 Wh/kg. Due to the neutral buoyancy of the cells and battery, buoyancy foam can be reduced in the vehicle, saving cost, weight and volume. MSubs has integrated the battery to power a test ROV supplied by Deep- bots AS. As the OXIS chemistry continues to mature and improve in terms of gravi- metric energy, greater gains will occur in battery pack performance. Modular Unmanned Vehicle Under Development A team of engineers from thyssen- krupp, Berlin Technical University, the University of Rostock, ATLAS ELEK- TRONIK and EvoLogics is now work- ing together to develop a new type of UUV. The Large Modifiable Underwater Mothership (MUM) project will re- ceive funding from the German Fed- eral Ministry for Economic Affairs and Energy over three years. It will open up new ways to explore and harness the potential of the world's oceans. MUM is breaking with old conven- tions: The modular, unmanned under- water vehicle performs its tasks mostly autonomously. Individual base modules can be freely combined with specific mis- sion modules to form large systems, enabling even unusual and highly spe- cialized tasks to be performed quickly and easily. Possible activities range from pay- load transportation and operations to research missions and stationary deep- sea tasks. This makes the vehicle ideal for use in offshore energy, deep-sea mining and maritime science. The emission-free fuel cell propul- sion system permits long ranges and deep diving depths and makes the vehicle ideal for use in highly ecologi- cally sensitive environments. Project partners are targeting mar- ket readiness by 2025. Research and development work is expected to be completed by 2020, with a 1:5 scale model built and tested. Darley Becomes US Distributor For Aquabotix UUV Aquabotix Ltd. has added W.S. Darley & Co., a 100-year-old de- signer, manufacturer and distributor of firefighting, defense and emergency services equipment, as a distributor for Aquabotix in the U.S. Through this partnership, Aquabotix will work closely with Darley Defense, a specialty division of Darley that fo- cuses on marketing new and existing products to the U.S. Department of Defense, to provide its underwater ve- hicles and camera systems to the U.S. Navy. Aquabotix's portable Hybrid AUV/ ROV and Endura ROV are both de- signed to aid navies by identifying and addressing increased underwater threats. These threats often occur in hazard- ous environments that are difficult and dangerous for divers. ST

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