MAR DEL PLATA, Argentina — The Latest on Argentina's search for a submarine missing with 44 crewmembers aboard (all times local):
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 U.S. and international monitors. They describe it as "short" and "violent."
But some experts say there's a fearsome possibility.
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."
Argentina says a sound detected in the search for a missing submarine with 44 crew members aboard is consistent with a non-nuclear explosion.
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.
U.S. 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.