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An autonomous underwater vehicle (AUV) can achieve precise observation in the sea. Also in Japan agency for Marine-earth Science and Technology (JAMSTEC) some observations with AUV ldquoURASHIMArdquo have been implemented mainly in deep ocean. Tracking or navigation of the AUV is significant to make the observations more valuable. Almost AUV equips an inertial navigation system (INS) to navigate own...
In JAMSTEC, the acoustic communication is investigated, especially in deep water environment. Then, short-range (up to 500 m) high speed (around 64 kbps) acoustic communication system for deep sea environment is investigated in our group. To obtaining an real sea data of acoustic transmission, an experiment was carried out at the depth of 1,000 m in February 2007. A transmitter was moored at near...
Recently, a number of bacteria including new one have been found from mud samples of Challenger Deep in the Mariana Trench. In order to get those samples or the sediment core in there, an underwater vehicle, which can dive to the deepest ocean and carry out the task, is needed, however, currently, there is no such vehicle in the world. So Japan Agency for Marine-Earth Science and Technology (JAMSTEC)...
JAMSTEC has developed the two types of underwater vehicle since 2005: an ROV to the oceans' deepest depth called ASSS11k (advanced sediment sampling system to 11,000 meter) and a hybrid underwater vehicle for use in shallow-water to mid-depth zones named PICASSO (Plankton Investigatory Collaborating Autonomous Survey System Operon). The most important purpose of the ASSS11k is to get a lot of mud...
Recently, a number of bacteria have been found from a mud sample of Challenger Deep in the Mariana Trench. Sampling those sediment samples, an ROV to the oceans' deepest depth is needed. But no vehicle gets to the deepest depth in the world. Scientists want to continuously explore the deepest parts of the oceans with a vehicle equipped with sediment samplers. JAMSTEC started developing a sediment...
JAMSTEC has been developing the remotely operated vehicle system having a limited role to explore the deepest parts of the oceans since April 2005. This ROV system's main mission is to survey sediments in sea bottoms. This system consists of a launcher and a small vehicle. The launcher carries two types of bottom samplers as well as the vehicle. One launches the small vehicle to make a preliminary...
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