Alvin submersible ready to get back in the water

17 February 2013 Last updated at 19:15 ET Help

One of the giants of ocean science, the Alvin deep-submersible, is almost ready to get back in the water after a $41m (£26.5m) refit.

The upgrade is intended to enable the 49-year-old vehicle to go 2,000m deeper, although some additional work will be required to achieve this goal.

Project manager Kurt Uetz and Alvin pilot Mike Skowronski gave the BBC a sneak peek at the refitted sub a month before it goes back in the water.

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