ARA San Juan (S-42)

Design

Main article: TR-1700-class submarine

Built by Thyssen Nordseewerke, San Juan was laid down on 18 March 1982 and launched on 20 June 1983. It had a single-hull design, with a lightweight bow and stern and a watertight superstructure in the central part. Its sister vessel, , is the only other one of its type, though the program originally sought to produce a larger number of submarines.

Name

The submarine's name derives from the province of San Juan; the names of all Argentine submarines begin with the letter S. Past ships with the same name are a destroyer (1911), a surveyor (1929), and a torpedo boat (1937).

The prefix ARA is the acronym of the Argentine Navy in Spanish ().

Operational history

The submarine entered service on 18 November 1985.

In 1994, during the FleetEx 2/94 "George Washington" exercise with the United States Navy, San Juan avoided detection by United States anti-submarine forces for the entire duration of the war game, penetrating the destroyer defense and "sinking" the command ship . The submarine took part in other exercises including Gringo-Gaucho and UNITAS.

The vessel underwent a mid-life update between 2008 and 2013, taking longer than expected due to budget constraints. The upgrade cost around 100 million pesos (US$12.4 million) and comprised more than 500,000 work hours during which the submarine was cut in half and had its four MTU engines and batteries replaced. The updates were carried out at the Argentine Industrial Naval Complex's (CINAR) Tandanor and Storni shipyards, in the southern sector of Buenos Aires port. Later, San Juan was tasked with carrying out surveillance exercises in the exclusive economic zone around Puerto Madryn, particularly in the role of combating illegal fishing.

Disappearance

Main article: Disappearance of ARA San Juan

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On 17 November 2017, it was announced that San Juan had not been heard from since 15 November when the vessel was 430 km from the coast, off San Jorge Gulf on its way to Mar del Plata from Ushuaia following a military exercise, and that a search and rescue operation had been launched in the same area. There were 44 sailors on board the missing submarine, including Argentina's first female submarine officer, Eliana Krawczyk. The submarine carried oxygen for no more than seven days when submerged.

Search

The search and rescue operation was carried out under the auspices of the International Submarine Escape and Rescue Liaison Office, an organisation of over 40 countries set up in 2003 following the Kursk submarine disaster. The search area was 482,507 km2 in size and weather conditions throughout the search and rescue period changed, making the task far more difficult on days with large waves and high winds. Search efforts continued several days, without success.

The director-general of the Vienna-based UN International Atomic Energy Agency IAEA Rafael Grossi, an Argentinian national, proposed the use of the international hydrophones network, owned by the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization, also based in Vienna, to seek information about the vessel's fate. He convinced Lassina Zerbo, CTBTO executive director, to search the organization's records for anomalies. On 23 November the Argentine Navy said an event consistent with an implosion had been detected at by the CTBTO listening posts on Ascension Island (HA10) and Crozet Islands (HA04), and records matched with the day the submarine stopped communicating.

By 24 November, the search and rescue operation involved more than 30 aircraft and ships from Argentina, the United Kingdom, Brazil, the United States, Chile, and other countries. More than 4,000 personnel from 13 countries assisted in the search, scouring an area the size of Spain.

On 27 November, a press release revealed that according to the submarine's last report from 15 November, San Juans snorkel had leaked water into the forward storage batteries the day before, which ignited a fire. After extinguishing the fire, the crew disconnected the forward batteries. The submarine continued onward, powered by the aft batteries.

On 30 November, 15 days after San Juan went missing, the Navy declared that the rescue phase of the operation was over, and the search for the submarine on the seabed would continue. The loss of 44 crewmen constituted the largest loss of life aboard a submarine since the malfunctioned in April 2003, until being surpassed by the loss of 53 crewmen aboard the Indonesian submarine KRI Nanggala in April 2021. A criminal investigation was launched into the disappearance.

Wreck discovery

On 16 November 2018, the remains of ARA San Juan were found at a depth of 907 m, at (20 km NNW from the seismic anomaly previously reported by the CTBTO) and nearly 270 nmi from Comodoro Rivadavia, by a remote submersible operated by the Norwegian ship of the company Ocean Infinity, a private maritime company hired by the Argentine government.

It had been considered that the probability of locating the wreck in the area where it was eventually found was 90%, but previous searches failed to find it due to insufficient technology and presence of numerous submarine canyons. A "hydro-acoustic anomaly" consistent with an implosion had been detected 30 nmi north of the submarine's last known position at 10:31 ART (13:31 UTC) on 15 November 2017. Photographs showed the shattered remains of the submarine broken up on the seabed. Ocean Infinity will receive a reward of US$7.5 million for finding the missing vessel. Argentine Navy spokesman Captain Jorge Balbi presented close-up photos of the wreck in a press briefing. The pictures show the imploded pressure hull, with the bow section, sail and propellers scattered in a 100 m diameter area of 8000 m2.

Commemoration

On 24 October 2021 a memorial commemorating the 44 crew members lost was unveiled in front of the Mar del Plata Naval Base.

References

References

1. (30 November 2017). "Submarino ARA San Juan: la Armada dio por finalizado el operativo de rescate y ya no busca sobrevivientes". La Nacion.
2. (12 March 2018). "Argentina Jews honor female submarine officer lost at sea". [[Times of Israel]].
3. (17 November 2018). "Ocean Infinity Locates the Missing Argentinian Submarine, ARA San Juan". Ocean Infinity.
4. (17 November 2018). "Argentine submarine: Missing ARA San Juan imploded, navy confirms".
5. Politi, Daniel. (17 November 2018). "Argentine Submarine That Vanished With 44 Aboard Is Found, Navy Says". [[The New York Times]].
6. Latinoamericana, Comunidad Submarinista. "Reparación de Media Vida Submarino Tipo TR1700 ARA San Juan S-42 (Segunda Parte)".
7. Miller, David. (2002). "The Illustrated Directory of Submarines". Zenith Press.
8. (5 March 2009). "Reparación de Media Vida Submarino Tipo TR1700 ARA San Juan S-42 (Primera Parte)". www.elSnorkel.com.
9. (17 November 2017). "Por qué se llama San Juan el submarino que es intensamente buscado". Diario de Cuyo.
10. (6 December 2012). "World Guide to Abbreviations of Organizations". Springer Science & Business Media.
11. A. Donaghy. (2 September 2014). "The British Government and the Falkland Islands, 1974-79". Palgrave Macmillan UK.
12. "Submarino Argentino ARA San Juan vuelve a estar en el agua.". www.elSnorkel.com.
13. (22 November 2017). "El día que el ARA San Juan sorprendió a la Armada de Estados Unidos". La Nacion.
14. (8 December 2014). "Ejercicio Fleetex 2/94 "George Washington"". www.elSnorkel.com.
15. Kiernan, Sergio. (3 August 2014). "El arte de reparar submarinos". Pagina 12.
16. (20 September 2016). "Comienza en Argentina la modernización del submarino TR-1700 ARA Santa Cruz-noticia defensa.com". Defensa.com.
17. (19 June 2014). "Argentine Navy receives refurbished TR1700 class submarine ARA San Juan". MercoPress.
18. (17 November 2017). "Cómo es el submarino ARA San Juan que es intensamente buscado". Infobae.
19. (17 November 2017). "Argentine navy loses contact with submarine". BBC News.
20. (6 November 2017). "Operaciones integradas del Comando de Adiestramiento y Alistamiento {{!}} Gaceta Marinera". gacetamarinera.com.ar.
21. (7 November 2017). "La Flota de Mar despliega su esplendor en Ushuaia". Zona Militar.
22. (16 November 2017). "Desapareció un submarino argentino y se desplegó un operativo de rescate". La Nacion.
23. (17 November 2017). "Argentine navy says its lost contact with submarine". CNN.
24. (17 November 2017). "Search Underway for Argentine Navy Submarine With 44". New York Times.
25. Uki Goñi. (20 November 2017). "Missing Argentinian submarine running out of air as search enters 'critical phase'". The Guardian.
26. (17 July 2015). "An officer of Italian Navy at the head of ISMERLO". [[Marina Militare]].
27. (21 November 2017). "Qué es Ismerlo, el sistema internacional que alertó al mundo sobre el ARA San Juan". La Nacion.
28. (21 November 2017). "Submarino ARA San Juan: qué se sabe hasta ahora sobre su desaparición y la búsqueda para encontrarlo". La Nacion.
29. (21 November 2017). "Con las mejoras meteorológicas, se intensifica la búsqueda del submarino". Telam.
30. (26 November 2017). "El fuerte viento demora el operativo y complica las tareas de rescate". La Nacion.
31. (23 November 2017). "'Explosion' dashes sub crew survival hopes". BBC News.
32. (23 November 2017). "Exclusivo: detalles del informe que recibió el Gobierno sobre la explosión en el submarino ARA San Juan".
33. (23 November 2017). "Submarino ARA San Juan: cómo se detectó la explosión y qué podría significar". La Nacion.
34. (23 November 2017). "Vocero de la Armada: "Hubo un evento singular consistente con una explosión" en el ARA San Juan". Telam.
35. (23 November 2017). "Búsqueda del ARA San Juan: cómo se detectó la explosión y por qué se conoció una semana después". Infobae.
36. (24 November 2017). "U.S. Navy plane scours South Atlantic in search for Argentine sub". Reuters.
37. "Submarino ARA San Juan: cómo fue el principio de incendio en las baterías".
38. (30 November 2017). "Hope for Argentina Submarine Crew Fades". The New York Times.
39. "Indonesian Navy says missing KRI Nanggala 402 sank".
40. "ARA San Juan: el clima adverso le dio dramatismo a un hallazgo con el último aliento". La Nacion.
41. (14 September 2018). "ARA San Juan: Search locates 5 objects with potential links to missing sub". Buenos Aires Times.
42. (17 November 2018). "Argentina minister says country without means to rescue submarine". [[Toronto Star]].
43. Rogoway, Tyler. "Argentina's Lost Submarine Has Finally Been Found (Updated)". The Drive.
44. (2018-11-17). "La Armada Argentina dice que el submarino San Juan implosionó y se partió en varias partes". RTVE.es.
45. (25 October 2021). "Inauguraron el Memorial del submarino ARA "San Juan" en homenaje a sus 44 tripulantes". Ministerio de Defesa.
46. "Inauguraron un memorial en honor a los tripulantes del Ara San Juan".