An Indonesian navy ship works near what appears to be oil slicks during a search Friday for the submarine KRI Nanggala 402 in the Bali Sea.

An Indonesian Navy ship sails near what appears to be oil slicks during the search for submarine KRI Nanggala that went missing while participating in a training exercise on Wednesday, in this aerial photo taken from a maritime patrol aircraft of 800 Air Squadron of the 2nd Air Wing of Naval Aviation Center (PUSPENERBAL) over the Bali Sea, Indonesia, Friday, April 23, 2021. Indonesian navy ships scoured the waters off Bali on Friday as they raced against time to find the submarine that disappeared two days ago and has less than a day’s supply of oxygen left for its 53 crew. (AP Photo/Eric Ireng)