A heart-wrenching video shows the crew of the doomed Indonesian submarine singing along together weeks before their tragic deaths.
The footage, which has been shared by the Indonesian navy, shows the servicemen singing while a guitarist plays a song called Sampai Jumpa which translates as 'until we meet'.
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The video was filmed just weeks before all 53 men aboard the KRI Nanggala-402 died when the submarine broke into several parts in the Bali Sea.
Indonesia's president Joko Widodo shared his condolences to the relatives of those who died.
He said: "All of us Indonesians express our deep sorrow over this tragedy, especially to the families of the submarine crew."
The vessel was first declared missing on 21 April sparking a search.
Navy spokesman First Admiral Julius Widjojono said it had been taking part in a torpedo drill, but failed to relay results from the exercise as expected.
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But the search came to a tragic end on 25 April when the 44-year old vessel was found cracked at the bottom on the ocean floor.
Military chief Hadi Tjahjanto told reporters in Bali on Sunday (25 April): "We received underwater pictures that are confirmed as the parts of the submarine, including its rear vertical rudder, anchors, outer pressure body, embossed dive rudder and other ship parts."
Tjahjanto added: "With this authentic evidence, we can declare that KRI Nanggala 402 has sunk and all the crew members are dead."
Navy chief of staff Yudo Margono added: "The KRI Nanggala is divided into three parts, the hull of the ship, the stern of the ship, and the main parts are all separated, with the main part found cracked."
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The navy previously said it believes the submarine sank to a depth of 600-700 metres (2,000-2,300ft), much deeper than its collapse depth of 200 metres (655ft), at which point water pressure would be greater than the hull could withstand.
The German-built diesel-powered KRI Nanggala-402 had been in service in Indonesia since 1981 and was carrying 49 crew members and three gunners as well as its commander, the Indonesian Defence Ministry said.
The cause of the disappearance was still uncertain, but Margono said the crew were not to blame.
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The navy had previously said an electrical failure could have left the submarine unable to execute emergency procedures to resurface.
Topics: World News