Indonesian Navy's KRI Singa-651 leaves the Tanjung Wangi port as the search continues for the missing KRI Nanggala-402 submarine in Banyuwangi, East Java Province Indonesia, April 24, 2021. ndonesian searchers have recovered debris believed to be from the missing submarine lost in the Bali Sea on Wednesday, the country's military chief said on Saturday. REUTERS/Ajeng Dinar Ulfiana

Indonesian Navy's KRI Oswald Siahaan-354 leaves the Tanjung Wangi port as the search continues for the missing KRI Nanggala-402 submarine in Banyuwangi, East Java Province Indonesia, April 24, 2021. Hopes for the 53 crew are dwindling, with officials saying that their supply of oxygen was expected to have run out early on Saturday. REUTERS/Ajeng Dinar Ulfiana

Indonesian Navy's KRI I Gusti Ngurah Rai-332 is seen while preparing to dock at Tanjung Wangi port as the search continues for the missing KRI Nanggala-402 submarine in Banyuwangi, East Java Province Indonesia, April 24, 2021. The Indonesian navy chief of staff said a scan had detected the submarine at 850 metres (2,788 feet), well beyond its survivable limits. REUTERS/Ajeng Dinar Ulfiana

Indonesian Navy's KRI I Gusti Ngurah Rai-332 is seen while preparing to dock at Tanjung Wangi port as the search continues for the missing KRI Nanggala-402 submarine in Banyuwangi, East Java Province Indonesia, April 24, 2021. The submarine, which disappeared as it prepared to conduct a torpedo drill, is designed to withstand a depth of up to 500 metres (1,640 ft). REUTERS/Ajeng Dinar Ulfiana

Indonesian Navy's KRI Oswald Siahaan-354 leaves the Tanjung Wangi port as the search continues for the missing KRI Nanggala-402 submarine in Banyuwangi, East Java Province Indonesia, April 24, 2021. REUTERS/Ajeng Dinar Ulfiana

An Indonesian Air Force plane arrives at Banyuwangi Airport to deliver equipment as the search continues for the missing KRI Nanggala-402 submarine, in Banyuwangi, East Java Province, Indonesia, April 23, 2021. REUTERS/Ajeng Dinar Ulfiana