Indonesian leader orders all-out effort to find submarine as oxygen runs low

Indonesia’s president has ordered an all-out effort to find a missing submarine in a race against time to save the 53 crew.

Indonesia sent a helicopter and five ships to search waters north of the holiday island of Bali but found no signs of the KRI Nanggala-402, which went missing early on Wednesday during a torpedo drill.

President Joko Widodo said on Thursday he had ordered the military and navy chiefs and the country's the search-and-rescue agency "to deploy all the forces and the most optimal efforts to find and rescue the submarine crew" .

Navy chief of staff Yudo Margono said the search was being aided by calm conditions but the crew's air supply would last only until Saturday. "Hopefully before they can be found, the oxygen will be enough," he told a news conference in Bali.

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The vessel had been cleared for use and was in good condition, he added.

The 1,395-tonne vessel was built in Germany in 1977, according to the defence ministry, and joined the Indonesian fleet in 1981. It underwent a two-year refit in South Korea that was completed in 2012.

Indonesia said several countries had responded to requests for assistance, with Malaysia and Singapore sending ships and Australia offering "help in any way we can".

An aerial search found an oil spill near the submarine’s dive location, and two navy vessels with sonar capability had been deployed to assist in the search, officials said.

The oil slick could indicate damage to the vessel or could be a signal from the crew, the navy said.

Admiral Yudo said authorities had found an item with “high magnetic force” floating at a depth of 50 to 100m.

Fatal accidents

Indonesia has been seeking to modernise its defence capabilities but some of its equipment is old and there have been fatal accidents in recent years.

Defence minister Prabowo Subianto said it was "imperative" that Indonesia modernise its defence equipment faster, but did not suggest there had been problems with the missing vessel.

Navy spokesman Julius Widjojono told KompasTV that the diesel-powered submarine, which runs on electric batteries, could sustain a depth of 250-500m.

“Anything more than that can be pretty fatal, dangerous,” the spokesman told KompasTV.

The waters in the area are shallower than in other parts of the archipelago but can still reach depths of more than 1,500m.

The navy on Wednesday said a blackout may have occurred during static diving, causing a loss of control and preventing emergency procedures from being carried out if the vessel falls to a depth of 600-700ms.

Military chief Hadi Tjahjanto said on contact with the submarine had been lost at 4.30am and a search was under way 96 km off Bali.

Indonesia in the past operated a fleet of 12 submarines bought from the Soviet Union to patrol the waters of the sprawling archipelago.

It now operates five – the two German-built Type 209 submarines and three newer South Korean vessels. – Reuters