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DSV Alvin

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The vessel weighs 17 tons. It allows for two scientists and one pilot to dive for up to nine hours at 4,500 metres (14,800 ft). The submersible features two robotic arms and can be fitted with mission-specific sampling and experimental gear. The plug hatch of the vessel is 0.48 metres (1 ft 7 in) in diameter and somewhat thicker than the 2 inches (51 mm) thick titanium sphere pressure hull; it is held in place by the pressure of the water above it. In an emergency, if Alvin were stuck underwater with occupants inside, the outer body, or cladding, of the submersible could be released and discarded using controls inside the hull. The titanium sphere would then rise to the surface uncontrolled. The vessel weighs 17 tons. It allows for two scientists and one pilot to dive for up to nine hours at . The submersible features two robotic arms and can be fitted with mission-specific sampling and experimental gear. The plug hatch of the vessel is in diameter and somewhat thicker than the thick titanium sphere pressure hull; it is held in place by the pressure of the water above it.

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Alvin in 1978, a year after first exploring hydrothermal vents. The rack hanging at the bow holds sample containers.

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300

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--05-26

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The vessel weighs 17 tons. It allows for two scientists and one pilot to dive for up to nine hours at . The submersible features two robotic arms and can be fitted with mission-specific sampling and experimental gear. The plug hatch of the vessel is in diameter and somewhat thicker than the thick titanium sphere pressure hull; it is held in place by the pressure of the water above it. As explained during its search of Titanic, in an emergency if Alvin is stuck underwater with occupants inside, the outer body of Alvin is able to come apart and the titanium sphere would then rise to the surface uncontrolled. It is unknown, however, if a human could survive the rapid trip to the surface. The vessel weighs 17 tons. It allows for two scientists and one pilot to dive for up to nine hours at 4,500 metres (14,800 ft). The submersible features two robotic arms and can be fitted with mission-specific sampling and experimental gear. The plug hatch of the vessel is 0.48 metres (1 ft 7 in) in diameter and somewhat thicker than the 2 inches (51 mm) thick titanium sphere pressure hull; it is held in place by the pressure of the water above it. In an emergency, if Alvin were stuck underwater with occupants inside, the outer body, or cladding, of the submersible could be released and discarded using controls inside the hull. The titanium sphere would then rise to the surface uncontrolled.