November 21, 2017 / 1:20 PM / 3 months ago

Weather improves but clock ticks for Argentine submarine search

MAR DEL PLATA, Argentina (Reuters) - The search for a missing Argentine submarine and its 44-member crew was helped by calmer seas on Tuesday, but there were no new clues about its location and worries multiplied because the vessel may be running low on oxygen, a navy spokesman said.

The ARA San Juan was en route from Ushuaia, the world’s southernmost city, to its base in Mar del Plata and was about 300 miles (480 km) off the coast when it gave its last location on Wednesday, soon after reporting an electrical malfunction.

If the German-built submarine had sunk or was otherwise unable to rise to the surface since it sent its last signal, it would be winding down its seven-day oxygen supply.

“Oxygen is a permanent worry. Every day that passes is more critical,” naval commander Gabriel Galeazzi said at an evening news conference in Mar del Plata.

More than a dozen boats and planes from Argentina, the United States, Britain, Chile and Brazil have joined the search. Authorities had been mainly scanning from the sky as storms halted the maritime hunt last weekend.

The weather improved on Tuesday, helping search efforts by sea. Wind speed slowed and waves that rose as high as 8 meters (26 feet) at the weekend diminished.

Planes participating in the search for the ARA San Juan submarine that is missing at sea are seen at the Almirante Zar Navy air base in Trelew, Argentina, in this handout released on November 21, 2017. Argentine Navy/Handout via REUTERS

“The search by patrol ships has become more effective thanks more than anything to less pounding by the waves, which have fallen to three or four meters,” navy spokesman Enrique Balbi told reporters in Buenos Aires.

“We have to make the most of today and tomorrow because on Thursday the weather is expected to get more complicated,” he said.

A sign in support of Maria Krawczyk, a submarine officer on board the Argentine navy submarine ARA San Juan, which went missing in the South Atlantic, and for the other 43 crew members is displayed on a fence outside the Argentine Naval Base where the submarine sailed from in Mar del Plata, Argentina November 20, 2017. The sign reads: "Girlfriend, we love you and we wait for you and your 43 mates. Be strong!" REUTERS/Marcos Brindicci

Also on Tuesday, authorities investigated white flares spotted in the South Atlantic overnight. Searchers found an empty floating raft, and noticed the flares from a distance. But the raft’s brand suggested it did not belong to the ARA San Juan, which was equipped with only red flares for emergencies and green flares for other situations, the navy said.

Searchers have suffered other disappointments.

Analysis of satellite signals and sounds detected by underwater probes, initially thought to be messages from the crew, has found they did not come from the vessel.

“The sounds could be biological. We have discarded the possibility that it was a clanging of morse code against the hull of the submarine,” Balbi said.

Relatives of crew members have been gathered at a naval base in Mar del Plata, where the search is being coordinated.

The ARA San Juan was launched in 1983, the newest of three submarines in the navy’s fleet, and underwent maintenance in 2008 in Argentina. Its four diesel engines and its electric propeller engines were replaced, according to specialist publication Jane’s Sentinel.

Additional reporting by Maximilian Heath, Juliana Castilla and Nicolas Misculin in Buenos Aires; Writing by Luc Cohen and Hugh Bronstein; Editing by Frances Kerry and Grant McCool

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