- A French vessel with a submersible capable of reaching the sea bed and transmitting images to the surface has arrived in the search area
- The Victor 6000 also has two mechanical arms capable of extremely delicate manoeuvres such as cutting or removing debris
- The area being scoured by aircraft and ships, as well as remotely operated vehicles, has been expanded to cover around 10,000 sq miles of ocean
- A second submersible, Juliet, is being flown in from Jersey – it has previously spent around 200 hours exploring the Titanic wreck
- The US Coast Guard said on Wednesday more noises had been heard in the search but it remains unclear what they are
- Contact with the sub – which has five people on board – was lost on Sunday as it made a descent to the Titanic wreck
- Having set off with 96 hours of air, according to the company, its oxygen tanks would likely be depleted some time on Thursday morning. Precisely when depends on factors such as whether the craft still has power and how calm those on board are, experts say, and assumes the Titan is still intact.