Ceramic for a submarine
Media playback is unsupported on your device
Video

Building a deep-diving submarine: Flotation

Four teams are diving to the deepest part of the ocean, the Mariana Trench, which lies 11km (7 miles) down in the western Pacific.

One of them is DOER Marine, a marine technology company based in San Francisco.

They are currently putting the finishing touches to the design of their Deep Search submersible.

Here, Liz Taylor, who runs the company, explains why ceramics are the key to making sure that the sub can sink or float.

  • 22 Feb 2012
Go to next video: A taste of diving to deepest ocean