Audio By Carbonatix
The US Coast Guard commander leading the search for the missing Titanic sub tells the BBC the crew may have around 20 hours of oxygen left.
Rear Admiral John Mauger says it's a very complex and difficult mission, with people working round the clock.
Earlier, the US Coast Guard said a noise heard in the search had given them "a target, a focus".
Mauger says they are working closely with leading acoustic experts to make sure they understand what that noise signature is.
More vessels are being sent to the search site, off the North American coast.
Contact with the sub - which has five people on board - was lost on Sunday as it made a 3,800m descent to the Titanic wreck.
Watch BBC News live coverage by clicking the play button at the top of this page.
Latest Stories
-
From communities to classrooms: Hearing care for all children
4 minutes -
The unseen game: Organisational politics and how to navigate it with purpose and integrity
11 minutes -
They ignored orders to vacate the site—Assemblyman speaks on Atta ne Atta galamsey tragedy
15 minutes -
Health benefits of peanuts
19 minutes -
University of GoldCoast, ICAG sign MoU to strengthen finance education and financial literacy
32 minutes -
Minimie Atsomo launches ‘Laugh-It-Off Creator’ challenge to support digital creators
33 minutes -
Police probe death of Liberian man after mob attack in Lashibi
37 minutes -
Why training children in AI today could shape Ghana’s future
41 minutes -
President Mahama recalls having nightmares after his father’s detention following 1966 coup
44 minutes -
Interim Kotoko coach Prince Owusu blames players for Vision FC draw
45 minutes -
Ghanaian residents in Qatar asked to register for emergency preparedness
53 minutes -
Ps. Jerry Eze, others to headline 2026 iYES Conference
1 hour -
10th Anniversary: Manye Nueki aka Gifty Rafiatu Carboo
1 hour -
Thousands more flights cancelled as Iran strikes continue
1 hour -
Ambassador Smith rallies US-based clergy to ignite patriotism and investment in Ghana
1 hour