Trial Begins for Four Former Argentine Navy Officers in ARA San Juan Submarine Sinking

Former Navy Officers Face Justice in Submarine Tragedy

The trial of four former high-ranking officers of the Argentine Navy began on Tuesday, March 3, 2026, in Río Gallegos, the provincial capital of Santa Cruz. The officers are accused of alleged responsibility in the 2017 sinking of the ARA San Juan submarine, a tragedy that claimed the lives of all 44 crew members.

The defendants, identified as former Training Command chief Luis López Mazzeo, former Submarine Force commander Claudio Villamide, the Submarine Command's former chief-of-staff Héctor Alonso, and former head of operations Hugo Correa, face serious charges. These include dereliction of duty, breach of official obligations, and aggravated negligent destruction, which carry potential prison sentences of between one and five years. All four officers maintain their innocence.

Details of the ARA San Juan Disaster

The ARA San Juan, a German-built TR-1700-class diesel-electric submarine, disappeared on November 15, 2017, while on a routine patrol in the South Atlantic. It was en route from Ushuaia to its home port at the Mar del Plata naval base. The vessel's last communication reported that seawater had entered the ventilation system, causing a battery to short-circuit and ignite a fire. Hours after contact was lost, an acoustic anomaly consistent with an implosion was detected in the area.

The submarine's wreckage was eventually located on November 16, 2018, more than 900 meters (2,950 feet) deep in a remote area of the South Atlantic, approximately 400 kilometers (250 miles) off the coast of Santa Cruz Province. The judicial investigation into the incident concluded that the submarine suffered from operational deficiencies and numerous technical defects following its 2015 mid-life overhaul.

The Crew and Families' Quest for Answers

The 44 crew members on board included 43 men and one woman, Eliana Krawczyk, who was Argentina's first female submarine officer. The sinking marked Argentina's worst naval disaster in decades. Many families of the victims have expressed difficulty attending the trial in Río Gallegos due to financial constraints. Valeria Carreras, a lawyer representing 34 families, emphasized the significance of the trial finally taking place, stating, 'The most important thing is that the trial is finally happening.'

Despite the military officers facing trial, no high-level political figures, including the president at the time, have been prosecuted in connection with the disaster.