Inside Unmanned Systems

DEC 2016-JAN 2017

Inside Unmanned Systems provides actionable business intelligence to decision-makers and influencers operating within the global UAS community. Features include analysis of key technologies, policy/regulatory developments and new product design.

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Page 36 of 59

37 unmanned systems inside December 2016/January 2017 ENGINEERING. PRACTICE. POLICY. example, perform a GEOTRACES and a bio- geochemical survey at the same time. Clio can also reduce cruise time. In the case of GEOTRACES cruises, the last one was 70 days long and about two thirds of it was sta- tion time, where the ship is stopped while the waters are sampled, Saito said. "It reduces the station time by roughly half," Saito said, "and then the cruise by roughly a third. You can save hundreds of thousands of dollars per cruise." To support those efficiencies Clio is specifi- cally designed to be simple to work with, said Mike Jakuba, the project's lead engineer at WHOI. "We really want to build a vehicle that ultimately will require only one person to op- erate—that's pretty key to the overall objective of maximizing utility of ships transiting the ocean and doing other work in parallel with this vehicle." Clio is equipped with 32 easily accessible fil- ters. To concentrate samples water is pumped through the filters—which can each be oper- ated separately. Once a sample is collected, the filter is f looded with a product called RNlater, which stops cel- lular activity, preserving the sample 'as is' until it can be retrieved. Designing an au- tonomous underwa- ter vehicle (AUV) for vertical bio-sampling at depth has present- Clio, (in circle below) carries 32 filters that concentrate the samples as the water is pumped through them. A CTD water sampler is lowered on a wire to test for conductivity (which indicates salinity), temperature and depth. Scientists must deploy only one such sampler at a time to avoid entanglements. Clio has no wires and can be operated concurrently with a CTD. On page 38: Rendering and photos courtesy of Woods Hole Oceanographic Institution (WHOI). The coral image is courtesy of a joint expedition between WHOI (sponsored by the Dalio Explore Fund), the Charles Darwin Foundation, Galapagos National Park Directorate and the WHOI-MISO Facility.

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