Just in from the BBC:
Expert says pipe-laying ship on scene
BBC News has been speaking to marine scientist and expedition leader David Mearns, who has been keeping a close eye on developments off Newfoundland.
He tells us that a commercial pipe-laying ship has arrived in the area where the submersible was last reported, and says this is welcome news.
“Just in the last hour or so... another commercial vessel, a very capable pipe laying vessel, modern ship, with ROV (remotely operated underwater vehicle) capabilities, is actually over the site now and we’re just hoping that it has the capabilities to reach those kind of depths – 3,800 metres – to search for the submersible and have the ability to recover it.
"There is some hope that that could happen.”