JAKARTA, Indonesia — A haunting video has emerged showing the crew of an Indonesian submarine singing together weeks before their vessel sank and split apart in the Bali Strait.

Indonesia found the wreckage of a navy submarine missing since Wednesday and declared all 53 of its crew members dead, the country’s military chief announced Sunday.

The video circulating online Monday shows several of the KRI Nanggala-402′s uniformed crew members singing “Sampai Jumpa,” an Indonesian hit whose title translates to “Goodbye," AFP reported. Seated in their midst, vessel commander Lt. Col. Heri Oktavian strums an acoustic guitar.

“Even though I’m not ready to be missing you, I’m not ready to live without you,” the group sings.

An Indonesian military spokesman told AFP the performance was originally recorded as a goodbye tribute for the submarine corps’ departing commander. Viewed after the sailors perished hundreds of meters down in the Bali Sea, it has become an elegiac coda to a search that captivated the world and found no survivors.

Underwater images captured by a remotely operated vehicle showed the submarine’s wreckage in the Bali Strait at a depth of 838 meters, officials said Sunday. A search and rescue team found debris including a vertical rudder, anchor and safety jackets.

“Based on the authentic evidence, we confirm that the KRI Nanggala has sunk and all the crew members have fallen,” Air Chief Marshal Hadi Tjahjanto told a news conference Sunday.

The announcement came a day after Indonesia’s navy said the vessel had almost certainly sunk. Officials said Saturday that rescuers had found debris floating in the Bali Strait near the Nanggala’s last known location.

Adm. Yudo Margono, the navy chief of staff, said the underwater images showed the submarine had split into three parts: the hull, the stern and the “main parts.” He ruled out an explosion, which he said would have been detected by sonar.

Tjahjanto said the Indonesian government would work with the International Submarine Escape and Rescue Liaison Office to recover the debris. Margono said the navy would investigate the cause so such an incident “will not happen in the future.”

Tjahjanto offered his condolences to the families of the crew members and said they would be honored posthumously. Defense Minister Prabowo Subianto also expressed his sorrow.

“All of the fallen crew members were the nation’s best men,” Subianto said. “I believe their dedication will not go in vain.”

In an address to the nation on Monday, Indonesian President Joko Widodo sent his sympathy to the families and said the government would pay for the education of the late crew members’ children, Yahoo News reported.

Tributes to the fallen sailors poured in Sunday and Monday as the nation mourned. Professors at the S. Rajaratnam School of International Studies honored Oktavian, who received a master’s degree at the school, in a Facebook post on the school’s alumni page. They described him as a “popular student” with a “strong personality," a “caring leader” who was “an inspiring figure to his fellow mariners.”

Indonesian submarine KRI Nanggala-402 The late Lt Col Heri Oktavian We are deeply saddened by the passing of Lt Col...

Posted by RSIS Alumni Association on Sunday, April 25, 2021

Officials said last week that the submarine’s oxygen supply would run out early Saturday. Sunday’s announcement removed the last hope for families who prayed their relatives might be discovered alive.

The submarine was conducting a training exercise Wednesday when it disappeared in the waters north of the Indonesian island of Bali. It fired two torpedoes in the Bali Strait as part of a war simulation, lost contact and never resurfaced, authorities said.

The search and rescue mission drew ships from Malaysia and Singapore and help from Australia, the United States, India and other countries. Rescuers found an oil spill on Wednesday near where the vessel had dived, which might have been a signal from the crew.

The submarine was one of five operated by Indonesia’s military. It was built in the 1970s and refitted in 2012, according to media reports.

Indonesia, the world’s largest archipelago with more than 17,000 islands, has faced off against Chinese vessels near the Natuna Islands in recent years. A two-week confrontation in the South China Sea in December 2019 led Indonesia to deploy warships and fighter jets to drive away Chinese fishing boats.

This report has been updated.

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