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This paper focuses on developing a NEW Autonomous Underwater Vehicle (AUV) equipped with Interferometric Real and Synthetic Aperture Sonar (IRSAS) for the exploration of submarine hydrothermal ore deposits. After the construction, the first sea trial carried out in Feb 2016. From successfully results, we feel certain that new AUV play an important role in surveys of hydrothermal deposits.
Around 15–20 Ganges river dolphins (platanista gangetica) inhabit the 12-km stretch from Karnavas to Narora Barrage in the Ganges river system. However, more than 10 dolphins were carried away downstream after the flood of June-July 2013. In order to urgently conduct a quick census to secure the dolphins in the original habitat, the existing compact four-hydrophone array system (J-Array) was remodeled...
For understanding the Ganges river dolphin's (Platanista gangetica) echolocation strategies and underwater behavior for a long-term span, targeting 15–18 Ganges river dolphins including calves, the annual long-term in-situ monitoring using the passive acoustic system (a 6-hydrophone array) has been conducted for 4 consecutive seasons, i.e. four monitoring phases, since November 2008. Recorded data...
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