DOS is working with Ocean Infinity on the seabed search for the lost submarine ARA San Juan (S-42) which disappeared off the East coast of Argentina.
ARA San Juan (S-42) is a TR-1700-class diesel-electric submarine which has been in service with the Argentine Navy since 19 November 1985.
In early November 2017, she was part of a navy exercise off Tierra del Fuego which included the sinking of the ex ARA Comodoro Somellera as a target.
On 17 November, it was announced that she had not been heard from since 15 November, and that an operation had been launched 200 nautical miles (370 km; 230 mi) southeast of San Jorge Gulf. There were at least 44 service personnel on board the missing submarine.
On 24 November, according to the Argentine Navy, 27 ships, 30 aircraft and 4,000 professionals from 13 countries participated in the search effort to find the missing Argentine submarine. This was already the largest search and rescue operation in the history of the South Atlantic Ocean. International assistance largely ended by early 2018 leaving Argentina as the only country involved in the search.
From early September 2018, the search for the submarine was aided by Ocean Infinity. DOS provides a number of their most experienced personnel to this operation including a senior sonar analyst (Target Master) and 3 surveyors.
DOS personnel have been involved in the search and recovery of a large number of vessels and aircraft over the past 30 years.