Film director James Cameron has begun an attempt to become the first person in 50 years to visit the deepest part of the ocean.
Cameron is travelling 11km (7 miles) down to the Mariana Trench in the western Pacific, where he hopes to spend six hours exploring and filming. He is making the dive in a specially designed and cramped one-man submarine, the Deepsea Challenger.
A manned descent to the trench was last attempted in 1960, by US Navy Lt Don Walsh and Swiss oceanographer Jacques Piccard.
To boldly go under: Director James Cameron embarks on his record-breaking descent SEVEN miles to the bottom of Pacific’s Mariana trench
- Aims to be first human to visit bottom since January 1960
- Solo submersible so cramped he can’t move his arms
- First of several competing missions to deepest point on Earth
- Mariana Trench is deeper than Everest is high
- The descent takes about 90 minutes
- Cameron will film the journey for a feature-length documentary