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| Argentina missing submarine: Russia joins search | Argentina missing submarine: Russia joins search |
| (about 1 hour later) | |
| Russia has joined the search for Argentina's missing submarine and is expected to deploy a remote-controlled device to trawl the sea on Saturday. | Russia has joined the search for Argentina's missing submarine and is expected to deploy a remote-controlled device to trawl the sea on Saturday. |
| It is one of a dozen countries involved in the search to find out what happened to the ARA San Juan and its 44-person crew. | It is one of a dozen countries involved in the search to find out what happened to the ARA San Juan and its 44-person crew. |
| The sub last made contact on Wednesday 15 November. | The sub last made contact on Wednesday 15 November. |
| Hopes of finding survivors have faded since a explosion was reported near its last-known location. | Hopes of finding survivors have faded since a explosion was reported near its last-known location. |
| Argentina's President Mauricio Marci said, on Friday, that an inquiry would be launched to find out the "truth" after a week of uncertainty and speculation. | Argentina's President Mauricio Marci said, on Friday, that an inquiry would be launched to find out the "truth" after a week of uncertainty and speculation. |
| Some of the relatives of the missing crew members have expressed anger at the government and the navy, saying the 34-year-old submarine was in ill repair and unsafe. | Some of the relatives of the missing crew members have expressed anger at the government and the navy, saying the 34-year-old submarine was in ill repair and unsafe. |
| Mr Macri said it had recently undergone a refit and was "in perfect condition". | Mr Macri said it had recently undergone a refit and was "in perfect condition". |
| What has Russia sent? | What has Russia sent? |
| Russia's Antonov aircraft - one of the world's largest planes - landed in Comodoro Rivadavia, a city in southern Argentina, on Friday night. An expectant crowd came to watch, according to local media. | |
| From there it headed to Ushuaia, the country's southern-most town, where the ARA San Juan began its recent trip. | From there it headed to Ushuaia, the country's southern-most town, where the ARA San Juan began its recent trip. |
| It arrived in Argentina carrying an unmanned submersible, known as the Pantera Plus, which conducts sonar scans up to a depth of 1,000 metres (3330ft). | It arrived in Argentina carrying an unmanned submersible, known as the Pantera Plus, which conducts sonar scans up to a depth of 1,000 metres (3330ft). |
| The Russian Ministry of Defence has also sent a scientific exploration ship, Yantar, which is yet to arrive having set off from near the coast of West Africa. It will be able to search at an even deeper level. | The Russian Ministry of Defence has also sent a scientific exploration ship, Yantar, which is yet to arrive having set off from near the coast of West Africa. It will be able to search at an even deeper level. |
| According to AFP news agency, past tests have shown that depths plummet to more than 3,000 metres on the edge of the Argentine shelf. | According to AFP news agency, past tests have shown that depths plummet to more than 3,000 metres on the edge of the Argentine shelf. |
| Experts say the Argentine sub would begin to break-up once below depths of around 600 metres. | Experts say the Argentine sub would begin to break-up once below depths of around 600 metres. |
| How Russia learnt from its own lost sub | How Russia learnt from its own lost sub |
| Russia's Kursk submarine sank in the Barents Sea in 2000 after a torpedo exploded during an exercise. | Russia's Kursk submarine sank in the Barents Sea in 2000 after a torpedo exploded during an exercise. |
| All 118 on board the nuclear combat sub died, including 23 who survived the blast but died due to a lack of oxygen. | All 118 on board the nuclear combat sub died, including 23 who survived the blast but died due to a lack of oxygen. |
| One of the last to die left a note, which signed off saying: "None of us can escape, I am writing blindly." | One of the last to die left a note, which signed off saying: "None of us can escape, I am writing blindly." |
| The Russian government was criticised for waiting five days to accept international assistance. | The Russian government was criticised for waiting five days to accept international assistance. |
| The tragedy sparked the creation of the International Submarine Escape and Rescue Liaison Office (Ismerlo) three years later. | The tragedy sparked the creation of the International Submarine Escape and Rescue Liaison Office (Ismerlo) three years later. |
| This office - based in Northwood in the UK - is behind the coordination of the global rescue effort for ARA San Juan, which was launched on 17 November when the Argentine Navy made the disappearance public. | This office - based in Northwood in the UK - is behind the coordination of the global rescue effort for ARA San Juan, which was launched on 17 November when the Argentine Navy made the disappearance public. |
| It enabled US ships, plus planes and vessels from various other countries, to be quickly deployed. | It enabled US ships, plus planes and vessels from various other countries, to be quickly deployed. |
| The differences between the subs | The differences between the subs |
| The Kursk was a nuclear combat submarine, 154m (505ft) long and participating in military exercises. | The Kursk was a nuclear combat submarine, 154m (505ft) long and participating in military exercises. |
| The 66m ARA San Juan is equipped with torpedoes, but it is almost exclusively dedicated to patrolling activities around the Argentine coast. | The 66m ARA San Juan is equipped with torpedoes, but it is almost exclusively dedicated to patrolling activities around the Argentine coast. |
| What other countries are involved | What other countries are involved |
| The US, the UK, Brazil, Chile, Norway, Germany, Canada, France, Peru, Colombia and Uruguay have also joined the search. | The US, the UK, Brazil, Chile, Norway, Germany, Canada, France, Peru, Colombia and Uruguay have also joined the search. |
| The US navy has also deployed two underwater vehicles that conduct sonar scans. | The US navy has also deployed two underwater vehicles that conduct sonar scans. |
| A Nasa research aircraft has flown over the search area but failed to spot anything. | A Nasa research aircraft has flown over the search area but failed to spot anything. |
| "We have the best naval, air and sensor resources available in the area, all focused on searching for the submarine," said Argentine navy spokesman Capt Enrique Baldi on Friday. | "We have the best naval, air and sensor resources available in the area, all focused on searching for the submarine," said Argentine navy spokesman Capt Enrique Baldi on Friday. |
| "We are still looking and no country is saying at the moment when they will stop. Logically it's time-limited but no-one is speaking about that at the moment." | "We are still looking and no country is saying at the moment when they will stop. Logically it's time-limited but no-one is speaking about that at the moment." |