JAKARTA, Indonesia (AP) Indonesian navy ships were scouring the waters off Bali on Friday as they raced against time to find a submarine that disappeared two days ago and has less than a days supply of oxygen left for its 53 crew.

The KRI Nanggala 402 went missing after its last reported dive Wednesday off the resort island, and concern is mounting the submarine may have sunk too deep to reach or recover. The navy chief said the submarine was expected to run out of oxygen by around 3 a.m. Saturday.

We will maximize the effort today, until the time limit tomorrow 3 a.m., military spokesperson Maj. Gen. Achmad Riad told reporters.

There have been no signs of life from the submarine, but the spokesperson refused to speculate on its fate.

A total of 24 navy and other ships and a patrol plane were being mobilized for Fridays search with a focus on the area where an oil slick was found after the submarine disappeared during an exercise. Rescuers made similar massive searches in the past two days.