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
-
German prosecutors arrest man accused of ordering killings during Rwanda genocide
32 minutes -
World Bank backs Nigeria 2026–2032 plan with $1.25 billion to spur jobs, private investment
41 minutes -
South African manufacturing sentiment worsens in June, Absa PMI shows
49 minutes -
Oil falls for a third straight day after US, Iran talks conclude in Doha
58 minutes -
World Bank approves Morocco clean energy project after ending climate lending target
1 hour -
Balogun scores and is sent off as US reach last 16
1 hour -
Government begins process to bring home Ghanaian killed in South Africa
1 hour -
We expect urgent action – Ghana presses AU over xenophobic attacks after citizen killed in South Africa
2 hours -
OpenAI proposes handing Trump administration 5% stake, FT reports
2 hours -
Funeral Invitation: Elder Dr. (Pharm.) Samuel Kwasi Nkansah
3 hours -
Oil prices fall 1% to 4-month lows as progress in US-Iran talks cools supply concerns
5 hours -
Mass school kidnappings in Nigeria in recent years
5 hours -
Over 900 arrested during South African anti-migrant protests
5 hours -
Kenyan court charges eight schoolgirls with their fellow students’ murder
5 hours -
Canada to make Eurovision Song Contest debut in 2027
5 hours