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For the purpose of environmental impact assessment (EIA) at deep-sea hydrothermal environments towards development and utilization of seafloor massive sulfide (SMS) deposits, we have been developing a cost effective cabled underwater observatory. To realize a flexible and expandable system configuration, the observatory has a simple star-type network and power supply topology by employing an Ethernet...
We were involved in development of a small lander for low-price and usability. The free fall type hadal zone research lander called “Edokko No.1” consists of 3 glass spheres and wireless connectable rubber bridge, and an observation equipment and levitation transponder device can be installed in the glass sphere. A continuous monitoring operation of periodic variations of surrounding ecosystem at...
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