The US Coastguard has rejected an offer of help from a UK firm which experts say may provide the "best hope" of finding the missing Titanic submarine, as the window of opportunity to rescue the five onboard rapidly closes.
British company Magellan Limited has had a deep-sea submersible craft “ready to support” the rescue mission since early on Monday, with the ability to reach depths of 6,000 metres and prior experience of visiting the Titanic wreckage site.
