Concentration on knocking noises: can the "Titan" submarine be saved?

euronews Concentration on knocking noises: can the "Titan" submarine be saved? Article by Euronews • 1 hour ago Rescue operation is in full swing More than three days after the Titan submersible disappeared in the Atlantic, hopes of rescuing the missing adventurers are dwindling. The oxygen for the five people on board is enough until this Thursday morning, they said - if the "Titan" is still intact at all. The rescue teams led by the US Coast Guard are still in action. US Coast Guard search coordinator Jamie Frederick said that in a search and rescue operation, one must remain "optimistic and hopeful," adding that he did not want to engage in a discussion of "when that operation will end ". On Wednesday, rescue teams focused on an area where knocking signs had previously been recorded. According to an internal US government memo, the sounds appeared periodically. The sounds had fueled hopes of being able to find the submersible with the occupants. Where do the recorded sounds come from? According to a US expert, the sounds, which were interpreted as knocking, could have many causes. For example, Carl Hartsfield of the Oceanographic Systems Laboratory said that from his experience there were sounds made by biological substances "that to the untrained ear sound made by humans". They could also have come from ships in the search area. According to David Marquet, a retired US Navy captain, the records offer at least some hope. Regular knocking is just the kind of noise inmates would make to signal they were alive, he told the BBC. Contact with the submarine broke off on Sunday The search from the air and with ships was further intensified. A French special ship with a diving robot on board was expected on Thursday night (CEST). The Canadian "HMCS Glace Bay", which has a decompression chamber and medical staff on board, was also on its way to the huge search area. Divers who have been rescued must quickly get into such a chamber to prevent permanent damage. The US Navy sent the "Fadoss" ship lifting system. The submersible has been missing since Sunday morning local time. The "Titan" was with five people on board on the way to the wreck of the 1912 sunken luxury liner "Titanic", whose wreck lies at a depth of around 3800 meters. About an hour and 45 minutes after the start of the dive, contact with the mother ship "Polar Prince" was lost.