Indonesia said Friday it will salvage a submarine that sank off the coast of Bali, as grieving relatives paid their respects to the dozens of crew killed in the disaster.

Authorities had yet to confirm if they would try to haul up the KRI Nanggala 402 from the seafloor, after it was spotted cracked in three pieces.

The navy on Friday said it was waiting on the arrival of two ships, including a vessel sent by China, that are equipped to handle deep-sea salvage operations.

High-powered magnets and air balloons were among the possible options, but how and when the cracked submarine would be brought to the surface was uncertain, said navy chief Yudo Margono.

"It's hard to talk about specific timing, but I can say that as soon as help arrives, we'll start," he told reporters.

The submarine's 53-strong crew are believed to still be inside the vessel, Margono said.

An underwater rescue vehicle supplied by neighbouring Singapore gave visual confirmation that the German-built sub was lying on the sea floor more than 800 metres (2,600 feet) deep.

The eerie images were final confirmation that there was no hope of finding survivors.

On Friday, victims' families cast flowers from a navy ship into waters where the sub went down as part of a remembrance ceremony.

The submarine -- one of five in Indonesia's fleet -- disappeared last week while it was scheduled to take part in live torpedo training exercises.

The crew asked for permission to dive. It lost contact shortly after.&nbsp;

Later, search teams spotted an oil spill where the vessel was thought to have submerged, pointing to possible fuel tank damage and a catastrophic accident.

The military has yet to offer an official explanation for the sinking of the decades-old submarine, which was delivered to the Southeast Asian nation in 1981.

It has said, however, that the reconditioned vessel was seaworthy and discounted the possibility of an explosion.

The navy has said that the submarine may have suffered a blackout and left the crew unable to perform emergency measures.

Its hull would have been torn apart as it sunk to depths far below what the KRI Nanggala was built to withstand, they said.

The submarine's former commander, Rear Admiral Muhammad Ali, has told local media that a so-called internal solitary wave could have been to blame.&nbsp;

The natural phenomenon occurs when different sea depths come together, creating forces that could have dragged the vessel down, he said.

Indonesia said Friday it will salvage a submarine that sank off the coast of Bali, as grieving relatives paid their respects to the dozens of crew killed in the disaster.

Indonesia said Friday it will salvage a submarine that sank off the coast of Bali, as grieving relatives paid their respects to the dozens of crew killed in the disaster. Authorities had yet to confirm if they would try to haul up the KRI Nanggala 402 from the seafloor, after it was spotted cracked in three pieces. The navy on Friday said it was waiting on the arrival of two ships, including a vessel sent by China, that are equipped to handle deep-sea salvage operations. High-powered magnets and air balloons were among the possible options, but how and when the cracked submarine would be brought to the surface was uncertain, said navy chief Yudo Margono. "It's hard to talk about specific timing, but I can say that as soon as help arrives, we'll start," he told reporters. The submarine's 53-strong crew are believed to still be inside the vessel, Margono said. An underwater rescue vehicle supplied by neighbouring Singapore gave visual confirmation that the German-built sub was lying on the sea floor more than 800 metres (2,600 feet) deep. The eerie images were final confirmation that there was no hope of finding survivors. On Friday, victims' families cast flowers from a navy ship into waters where the sub went down as part of a remembrance ceremony. The submarine -- one of five in Indonesia's fleet -- disappeared last week while it was scheduled to take part in live torpedo training exercises. The crew asked for permission to dive. It lost contact shortly after. Later, search teams spotted an oil spill where the vessel was thought to have submerged, pointing to possible fuel tank damage and a catastrophic accident. The military has yet to offer an official explanation for the sinking of the decades-old submarine, which was delivered to the Southeast Asian nation in 1981. It has said, however, that the reconditioned vessel was seaworthy and discounted the possibility of an explosion. The navy has said that the submarine may have suffered a blackout and left the crew unable to perform emergency measures. Its hull would have been torn apart as it sunk to depths far below what the KRI Nanggala was built to withstand, they said. The submarine's former commander, Rear Admiral Muhammad Ali, has told local media that a so-called internal solitary wave could have been to blame. The natural phenomenon occurs when different sea depths come together, creating forces that could have dragged the vessel down, he said.

Indonesia to salvage submarine after deadly sinking disaster

A poignant video has emerged showing the crew of a sunken Indonesian submarine singing happily together on board their vessel.

The video, filmed a few weeks before the KRI Nanggala 402 went down with all hands lost, shows some of the 53-strong crew singing "Sampai Jumpa", an Indonesian hit whose title means "Goodbye".

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Selamat jalan pahlawan bangsa, patriot sejati, terima kasih tugasmu telah usai 
guna menjaga perbatasan demi keutuhan NKRI 
 
Semoga amal dan ibadahmu diterima disisi-Nya.<a href="https://twitter.com/hashtag/jalesvevajayamahe?src=hash&amp;ref_src=twsrc%5Etfw">#jalesvevajayamahe</a> <a href="https://twitter.com/hashtag/tnial?src=hash&amp;ref_src=twsrc%5Etfw">#tnial</a> <a href="https://twitter.com/hashtag/indonesiannavy?src=hash&amp;ref_src=twsrc%5Etfw">#indonesiannavy</a> <a href="https://t.co/UkHWiLoZ7o">pic.twitter.com/UkHWiLoZ7o</a>
— TNI Angkatan Laut (@_TNIAL_) <a href="https://twitter.com/_TNIAL_/status/1386686920067936260?ref_src=twsrc%5Etfw">April 26, 2021</a></blockquote>
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Submarine commander Heri Oktavian is among those gathered around a seaman strumming an acoustic guitar.

"Even though I'm not ready to be missing you, I'm not ready to live without you," the sailors sing.

"I wish all the best for you."

The video was recorded as a farewell for the outgoing commander of the navy's submarine corps, whose successor took up his role in early March, Indonesian military spokesman Djawara Whimbo said.

The German-built submarine, one of five in&nbsp;Indonesia's fleet, disappeared early Wednesday while it was scheduled to do live torpedo training exercises off Bali.

An international search and rescue effort involving aircraft and specialised naval vessels, including from Singapore, Australia and the United States, had raced against the clock to find the submarine in case it was still intact and before oxygen ran out.

But on Sunday&nbsp;Indonesia's military chief Marshal Hadi Tjahjanto confirmed the Nanggala had sunk and all of it crew had died.

Navy chief of staff Yudo Margono said the crew were not to blame for the accident and that the submarine did not experience a blackout, blaming "forces of nature".

(With inputs from agencies)

A poignant video has emerged showing the crew of a sunken Indonesian submarine singing happily together on board their vessel. The video, filmed a few weeks before the KRI Nanggala 402 went down with all hands lost, shows some of the 53-strong crew singing "Sampai Jumpa", an Indonesian hit whose title means "Goodbye".

A poignant video has emerged showing the crew of a sunken Indonesian submarine singing happily together on board their vessel. The video, filmed a few weeks before the KRI Nanggala 402 went down with all hands lost, shows some of the 53-strong crew singing "Sampai Jumpa", an Indonesian hit whose title means "Goodbye". Selamat jalan pahlawan bangsa, patriot sejati, terima kasih tugasmu telah usai guna menjaga perbatasan demi keutuhan NKRI Semoga amal dan ibadahmu diterima disisi-Nya.#jalesvevajayamahe #tnial #indonesiannavy pic.twitter.com/UkHWiLoZ7o — TNI Angkatan Laut (@_TNIAL_) April 26, 2021 × Submarine commander Heri Oktavian is among those gathered around a seaman strumming an acoustic guitar. "Even though I'm not ready to be missing you, I'm not ready to live without you," the sailors sing. "I wish all the best for you." The video was recorded as a farewell for the outgoing commander of the navy's submarine corps, whose successor took up his role in early March, Indonesian military spokesman Djawara Whimbo said. The German-built submarine, one of five in Indonesia's fleet, disappeared early Wednesday while it was scheduled to do live torpedo training exercises off Bali. An international search and rescue effort involving aircraft and specialised naval vessels, including from Singapore, Australia and the United States, had raced against the clock to find the submarine in case it was still intact and before oxygen ran out. But on Sunday Indonesia's military chief Marshal Hadi Tjahjanto confirmed the Nanggala had sunk and all of it crew had died. Navy chief of staff Yudo Margono said the crew were not to blame for the accident and that the submarine did not experience a blackout, blaming "forces of nature". (With inputs from agencies)

Before the tragedy: Indonesia Navy releases video of submarine crew singing a farewell song

Indonesian&nbsp;President&nbsp;Joko Widodo on Monday expressed&nbsp;condolences&nbsp;to the&nbsp;families&nbsp;of the 53&nbsp;crew&nbsp;members aboard the Nanggala-402&nbsp;submarine&nbsp;that was found a day earlier broken into three parts at the bottom of the Bali Sea.

In an address to the nation, the&nbsp;president&nbsp;also said that the government would pay for the education of the children of the&nbsp;crew&nbsp;members.

All 53 crew aboard an Indonesian submarine that disappeared last week were killed, the military said Sunday as it confirmed the vessel had been found in pieces on the seafloor.

Also read|&nbsp;<a href="https://www.wionews.com/world/sunken-missing-indonesian-submarine-found-cracked-open-by-rescuers-380136">Sunken missing Indonesian submarine found cracked open by rescuers</a>

Authorities said that they picked up signals early Sunday from a location more than 800 metres (2,600 feet) deep -- far below what the KRI Nanggala 402's steel hull was built to withstand.

They had used an underwater submarine rescue vehicle supplied by neighbouring Singapore to get visual confirmation of the stricken vessel.&nbsp;

"It was broken into three pieces," said Navy Chief of Staff Yudo Margono.

More parts from the doomed submarine were also retrieved, including an anchor and fluorescent orange safety suits for emergencies, authorities said.

The discovery came&nbsp;a day after the navy had first confirmed the retrieval of fragments from the submarine and declared that it had sunk, effectively ending any chance of finding survivors.

Among the earlier items recovered were a piece of the torpedo system and a bottle of grease used to lubricate periscopes.

They also found a prayer mat commonly used in&nbsp;Indonesia, the world's most populous Muslim-majority nation.

Warships, planes and hundreds of military personnel had led a frantic search for the submarine since it disappeared this week during training exercises, hoping for a miracle rescue before its known oxygen reserves ran out.

But on Sunday, Indonesian military head Hadi Tjahjanto said there was no chance of finding any of the crew alive.

"With deep sadness, I can say that all 53 personnel onboard have passed," he told reporters.&nbsp;

President Joko Widodo described the sailors as&nbsp;Indonesia's "best patriots".

"All Indonesians convey their deep sadness over this incident, especially to the families of the submarine crew," he said.

Authorities have not given an explanation for the accident but said that the submarine may have suffered a blackout that left its crew unable to resurface.

They discounted an explosion, however, saying Saturday that the evidence suggested the submarine came apart as it was crushed by massive water pressure in the vast depths.

Neighbouring Malaysia, as well as the United States, India and Australia, were among the nations helping in the hunt.

Search vessels, reconnaissance aircraft and submarine rescue ships had been deployed to scour a zone of about 10 square nautical miles (34 square kilometres).

The submarine, one of five in&nbsp;Indonesia's fleet,&nbsp;disappeared early Wednesday while it was scheduled to do live torpedo training exercises off Bali.

The crew asked for permission to dive. It lost contact shortly after.

Later, search teams spotted an oil spill where the vessel was thought to have submerged, pointing to possible fuel-tank damage, and a catastrophic accident.

The submarine,&nbsp;delivered to&nbsp;Indonesia&nbsp;in 1981, was seaworthy, the military said.

The model has been used by more than a dozen navies around the world.

But investigators would look at the Indonesian submarine's age as a potential factor, analysts have said.

The disaster was among a string of fatal submarine accidents over the past few decades.

Among the worst was the 2000 sinking of the Kursk, the pride of Russia's Northern Fleet.

That submarine was on manoeuvres in the Barents Sea when it sank with the loss of all 118 aboard. An inquiry found a torpedo had exploded, detonating all the others.

Most of its crew died instantly but some survived for several days before suffocating.

Indonesian President Joko Widodo on Monday expressed condolences to the families of the 53 crew members aboard the Nanggala-402 submarine that was found a day earlier broken into three parts at the bottom of the Bali Sea.

Indonesian President Joko Widodo on Monday expressed condolences to the families of the 53 crew members aboard the Nanggala-402 submarine that was found a day earlier broken into three parts at the bottom of the Bali Sea. In an address to the nation, the president also said that the government would pay for the education of the children of the crew members. All 53 crew aboard an Indonesian submarine that disappeared last week were killed, the military said Sunday as it confirmed the vessel had been found in pieces on the seafloor. Also read| Sunken missing Indonesian submarine found cracked open by rescuers Authorities said that they picked up signals early Sunday from a location more than 800 metres (2,600 feet) deep -- far below what the KRI Nanggala 402's steel hull was built to withstand. They had used an underwater submarine rescue vehicle supplied by neighbouring Singapore to get visual confirmation of the stricken vessel. "It was broken into three pieces," said Navy Chief of Staff Yudo Margono. More parts from the doomed submarine were also retrieved, including an anchor and fluorescent orange safety suits for emergencies, authorities said. The discovery came a day after the navy had first confirmed the retrieval of fragments from the submarine and declared that it had sunk, effectively ending any chance of finding survivors. Among the earlier items recovered were a piece of the torpedo system and a bottle of grease used to lubricate periscopes. They also found a prayer mat commonly used in Indonesia, the world's most populous Muslim-majority nation. Warships, planes and hundreds of military personnel had led a frantic search for the submarine since it disappeared this week during training exercises, hoping for a miracle rescue before its known oxygen reserves ran out. But on Sunday, Indonesian military head Hadi Tjahjanto said there was no chance of finding any of the crew alive. "With deep sadness, I can say that all 53 personnel onboard have passed," he told reporters. President Joko Widodo described the sailors as Indonesia's "best patriots". "All Indonesians convey their deep sadness over this incident, especially to the families of the submarine crew," he said. Authorities have not given an explanation for the accident but said that the submarine may have suffered a blackout that left its crew unable to resurface. They discounted an explosion, however, saying Saturday that the evidence suggested the submarine came apart as it was crushed by massive water pressure in the vast depths. Neighbouring Malaysia, as well as the United States, India and Australia, were among the nations helping in the hunt. Search vessels, reconnaissance aircraft and submarine rescue ships had been deployed to scour a zone of about 10 square nautical miles (34 square kilometres). The submarine, one of five in Indonesia's fleet, disappeared early Wednesday while it was scheduled to do live torpedo training exercises off Bali. The crew asked for permission to dive. It lost contact shortly after. Later, search teams spotted an oil spill where the vessel was thought to have submerged, pointing to possible fuel-tank damage, and a catastrophic accident. The submarine, delivered to Indonesia in 1981, was seaworthy, the military said. The model has been used by more than a dozen navies around the world. But investigators would look at the Indonesian submarine's age as a potential factor, analysts have said. The disaster was among a string of fatal submarine accidents over the past few decades. Among the worst was the 2000 sinking of the Kursk, the pride of Russia's Northern Fleet. That submarine was on manoeuvres in the Barents Sea when it sank with the loss of all 118 aboard. An inquiry found a torpedo had exploded, detonating all the others. Most of its crew died instantly but some survived for several days before suffocating.

Joko Widodo sends condolences to families of crew on doomed submarine