From 2011 to 2013, the United States' famous manned sub Alvin went through a series major upgrades. This image shows Alvin leaving its operators in Woods…Read More »
Hole, Mass., for the U.S. West Coast, where it successfully underwent sea trials in November 2013. The Navy certified Alvin in January 2014 to dive up to 12,467 feet (3,800 meters), opening the door for science missions aboard the vessel. Less «
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Alvin's New Sphere
Credit: Tom Kleindinst, Woods Hole Oceanographic Institution
The upgraded submersible Alvin features five viewing ports (three visible here) for up to three passengers.
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Alvin's Sphere Test
Credit: Jeff McDonald, Woods Hole Oceanographic Institution.
Alvin's new titanium sphere, wired up for a pressure test in June 2012.
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Credit: Copyright Wynne Parry
The old sphere is on display at the Woods Hole Oceanographic Institution.