Indonesian rescue groups are fearing the worst as oxygen provides on a lacking Indonesian naval submarine are thought to have run out.
There are fears the vessel carrying 53 crew might already have sunk to a depth the place it would have been crushed.
The KRI Nanggala 402 disappeared on Wednesday throughout workout routines off the coast of Bali, sparking a frantic search to find the stricken vessel.
Australia, India, Malaysia and Singapore have thus far despatched help.
And a US Navy P-8 Poseidon plane landed in Bali early on Saturday morning.
“Indonesia is a good friend and strategic partner. We were all deeply saddened to see the reports about their submarine and our thoughts and our prayers are with the Indonesian sailors, the Indonesian navy, and of course all their families,” mentioned Pentagon spokesman John Kirby.
An oil slick the place it was thought to have submerged steered injury to a gasoline tank might have been an element.
The Indonesian navy mentioned late on Thursday night time that it had detected indicators of an object at a depth of between 50 and 100 metres (165 to 330 ft), and had deployed ships with sonar-tracking tools within the hope it was the KRI Nanggala 402.
A navy spokesman mentioned the submarine would solely have sufficient oxygen to final till round 03:00 native time on Saturday (21:00 GMT on Friday). That deadline has now handed.
At least six warships, a helicopter and 400 individuals have since been concerned within the search. Singapore and Malaysia have dispatched ships to the realm, and Australia, France and Germany have additionally supplied help.
The KRI Nanggala 402 misplaced contact shortly after requesting permission to dive throughout dwell torpedo workout routines early on Wednesday morning. The German-built vessel is considered one of 5 submarines operated by Indonesia. It was made within the late 1970s, and underwent a two-year refit in South Korea that was accomplished in 2012.
A navy spokesman instructed the BBC the incident was the primary time Indonesia had misplaced considered one of its submarines. But comparable incidents have occurred elsewhere.
In 2000, the Kursk, a Russian navy sub, sank throughout manoeuvres within the Barents Sea with the lack of all 118 crew. An inquiry discovered that one torpedo had exploded, detonating all of the others. Most of the Kursk’s crew died immediately however some survived for a number of days earlier than suffocating.
In 2003, 70 Chinese naval officers and crew have been killed in an accident on a Ming-class submarine throughout workout routines.
And in 2017, an Argentine military submarine went missing within the southern Atlantic with 44 crew on board. Its wreck was positioned a yr later and officers mentioned the submarine had imploded.