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Deep Diver
''Deep Diver'' was the name of a deep-sea scientific research submersible built by Edwin Albert Link. ''Deep Diver'' was the first small submersible designed for lockout diving, allowing divers to leave and enter the craft while underwater. It was first launched in January 1966.
==Construction and design==
''Deep Diver'' was initially known as the ''Perry-Link'' #4 and was built in Riviera Beach, Florida by the Perry Submarine Company. Its name was subsequently changed to ''Deep Diver'' and its ownership transferred to Link's company, Ocean Systems, Inc.〔〔 The submersible contained two compartments: a divers' compartment, developed from Link's earlier work with his Submersible Decompression Chamber (SDC), which allowed divers to be compressed to the ambient pressure of the ocean and leave the submersible to work underwater, and a pilots' compartment which remained at surface pressure, allowing the pilot and an observer to make dives without undergoing decompression. The two compartments were connected by a hatch which could be sealed off. ''Deep Diver'' was the first modern diver lock-out submersible.〔〔Busby, pp. 55-56.〕
''Deep Diver'' was 22 feet long and 8.5 feet tall. It weighed 8.25 tons dry. It allowed one pilot and three observers to dive for a total of 32 man-hours to a depth limit of 1350 feet. The pressure hull was made of steel, 54 inches thick for the pilots' and divers' compartments. ''Deep Divers main hatch was 23 inches in diameter. The submersible featured no manipulators. It had twenty-one acrylic plastic viewports. The ballast and trim tanks provided 845 pounds and 676 pounds of positive buoyancy, respectively, when emptied. A large battery pod containing four battery banks could be jettisoned in an emergency, providing an additional 1500 pounds of buoyancy.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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