HROV Nereus was equipped with alumina ceramic spheres that we designed and manufactured for the project to provide balanced flotation. Image courtesy of Advanced Imaging and Visualization Laboratory, Woods Hole Oceanographic Institution.
Read more at WHOI’s Hades Nereus Website.
UPDATE: On May 10, 2014, the Nereus was confirmed lost in the Kermadec Trench. During its deployments, Nereus brought back to the surface specimens of animals previously unknown to science and seafloor sediment destined to help reveal the physical, chemical, and biological processes that shape the deep-ocean ecosystem and that make ocean trenches unlike almost any other part of the planet.