China is continuing to make significant gains in developing submarine technology but is still dependent on Russia for its aircraft know-how, defense specialists at a recent conference here on the transformation of Brazil's military said. Foremost among its underwater systems is the new Jialong deep-water submersible that reached its own record depth of some 15,000 feet in the Pacific Ocean on last month. The craft is designed to be the world’s deepest-diving submersible and descends at a rate of 120 feet per minute. Such submersibles are a key element for all nations seeking to develop submarine forces.
The craft are able to chart currents and create highly accurate surveys of the ocean floor, literally creating topographical maps and ocean flow patterns that are indispensable for submarines seeking to mask their presence.
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