‘Explosion’ raises fears for Argentine sub
Experts say the apparent explosion detected in the search for a missing Argentine sub could be especially ominous for hopes to rescue the 44 people aboard.
Argentina’s navy says it’s too early to say what might have produced the sound detected by US and international monitors. They describe it as ‘short’ and ‘violent.’
But some experts say there’s a fearsome possibility, reports the Associated Press.
The search location straddles the edge of the continental shelf and depths reach about 10,000 feet (3,000 meters).
Retired Navy Capt. James H. Patton Jr. says that if a submarine went too deep, ‘it would just collapse.’
He says ‘It would sound like a very, very big explosion to any listening device.’
Navy spokesman Enrique Balbi said Thursday that the relatives of the crew have been informed and that the search will continue until there is full certainty about the fate of the ARA San Juan.
Ships and planes have returned to a search area to check on the noise that experts say could provide a clue to the vessel’s location.
US and specialist agencies say the ‘hydro-acoustic anomaly’ was produced just hours after the navy lost contact with the submarine on Nov. 15.
Experts worry that if the ARA San Juan is intact but submerged, its crew might have only enough oxygen to last seven to 10 days.
The sub had only a seven-day supply of oxygen, a fact that drained hope from some of the relatives of the crew who have gathered at the vessel’s base in the city of Mar del Plata, the Reuters reported.
‘What’s the point of hope if it’s already over?’ Itati Leguizamon, wife of one of the missing crew members, told reporters.
The navy did not have enough information to say what the cause of the explosion could have been or whether the vessel might have been attacked, Balbi said.
Search-and-rescue crews were undeterred by a series of false leads that raised hope over recent days that the sub might be located. Asked during an evening news conference about the fate of the 44 sailors, Balbi said the situation was ‘critical’.
‘We are not going to enter into conjecture out of respect for the families,’ he added.
The information about the possible explosion was received on Thursday from the Comprehensive Nuclear Test-Ban Treaty Organization, or CTBTO, an international body that runs a global network of listening posts designed to check for secret atomic blasts.
The Vienna-based agency, which has monitoring stations equipped with devices including underwater microphones that scan the oceans for sound waves, said in a statement that two of its stations had detected an unusual signal near where the submarine went missing. The agency was more guarded about whether that was caused by an explosion.
Optimism fades
A huge sea and air hunt is being conducted for the San Juan, a German-built, diesel-electric powered submarine that was launched in 1983, as crew members’ relatives waited anxiously for news more than a week after the vessel disappeared.
The relatives had been largely optimistic until Thursday. They shed tears and insulted authorities after being briefed on the news of the possible explosion. They were told about it before the public announcement.
Balbi said the news of the abnormal sound was consistent with a separate report received on Wednesday of an ‘acoustic anomaly’ in the same area and around the same time. The San Juan was some 430 km (270 miles) off the Patagonian coast when it sent its last signal.
‘This is very important because it allows us to correlate and confirm the acoustic anomaly from the U.S. report yesterday,’ Balbi said. ‘Here, we’re talking about a singular, short, violent, non-nuclear event, consistent with an explosion.’
In Vienna, CTBTO hydroacoustic engineer Mario Zampolli said the signal his agency had detected ‘could be consistent with an explosion but there is no certainty about this.’ Speaking to Reuters, he agreed with Balbi’s description of the signal as unusual and short, adding that the cause was non-natural.
The submarine was en route from Ushuaia, the southernmost city in the world, to Mar del Plata, 400 km (250 miles) south of Buenos Aires, when it reported an electrical malfunction shortly before disappearing.
Some relatives have questioned authorities for letting the crew navigate on an ageing submarine - criticism that has highlighted the armed forces’ dwindling resources since the end of a military dictatorship in the 1980s.
Authorities have said the level of maintenance, not the age, was what mattered, and that the vessel was in good condition.