Indonesian Military chief Hadi Tjahjanto delivers his speech as the debris believed to be from the missing Indonesian Navy KRI Nanggala-402 submarine is displayed during a media conference at Ngurah Rai Airport in Bali, Indonesia, April 24, 2021. Indonesian searchers have recovered debris believed to be from the missing submarine lost in the Bali Sea, officials said on Saturday (April 24), as hopes dwindle for the 53 crew which are expected to have run out of oxygen at dawn. ANTARA FOTO/Fikri Yusuf

Indonesian Navy officers showing debris from the missing Indonesian Navy KRI Nanggala-402 submarine are displayed during a media conference at Ngurah Rai Airport in Bali, Indonesia, April 24, 2021. Indonesian Navy Chief of Staff Yudo Margono said the exact location of the 44-year-old submarine was unknown but its presence had been detected and the search would continue. ANTARA FOTO/Fikri Yusuf

Indonesian Military chief Hadi Tjahjanto delivers his speech as the debris believed to be from the missing Indonesian Navy KRI Nanggala-402 submarine is displayed during a media conference at Ngurah Rai Airport in Bali, Indonesia, April 24, 2021. Rescuers have sent more than a dozen search helicopters and ships to the area where contact was lost, with the United States, Australia, Singapore, Malaysia, and India providing assistance. ANTARA FOTO/Fikri Yusuf

Indonesian Navy officers showing debris from the missing Indonesian Navy KRI Nanggala-402 submarine are displayed during a media conference at Ngurah Rai Airport in Bali, Indonesia, April 24, 2021. ANTARA FOTO/Fikri Yusuf

Debris from the missing Indonesian Navy KRI Nanggala-402 submarine are displayed during a media conference at Ngurah Rai Airport in Bali, Indonesia, April 24, 2021. REUTERS/Johannes P. Christo