How James Cameron's Deepsea Challenger submarine works

19 March 2012 Last updated at 20:27 ET Help

Hollywood director James Cameron may be close to making a dive to the deepest place on Earth.

In a one-man submarine, Deepsea Challenger, he plans to journey 11km (seven miles) down beneath the waves to the bottom of the Mariana Trench, in the western Pacific.

Here, the team's project manager David Wotherspoon reveals how the sub has been put together.

Click to see more of the BBC's special report on the race to the bottom of the ocean.

Produced by the BBC's Rebecca Morelle and Simon Hancock.

BBC © 2013 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.