{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-c03aa079.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-517835be.css\" media=\"all\" /\u003e\n\u003cdiv data-title='US captain comments on search submersible, Chinese plane returns' data-url='/boclips/videos/5c54c355d8eafeecae1607ba' data-video-url='/boclips/videos/5c54c355d8eafeecae1607ba' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nUS captain comments on search submersible, Chinese plane returns\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30356011\" href=\"/search?publisher_ids%5B%5D=30356011\"\u003eCurated Video\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eSearch crews will deploy a robotic submarine on Monday to scour the depths of the Indian Ocean in the hope of finding debris from missing flight MH370.US Navy Captain Mark Matthews said the submarine has a number of high priority...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eSearch crews will deploy a robotic submarine on Monday to scour the depths of the Indian Ocean in the hope of finding debris from missing flight MH370.\u003cbr/\u003eUS Navy Captain Mark Matthews said the submarine has a number of high priority locations to search, but will be operating in very difficult conditions.\u003cbr/\u003eThe Ocean Shield has been dragging a US Navy device called a Towed Pinger Locator (TPL) through the water to listen for any sounds from the black boxes' beacons. \u003cbr/\u003eOver the past 10 days, the equipment has picked up four separate signals.\u003cbr/\u003e\"Our mission right now is to go look at the higher priority areas and to see if there are any debris there, and just continue to keep hitting those small areas to see what we see on the bottom, potentially identify the source of the acoustic emissions that we received,\" Matthews said.\u003cbr/\u003eThe Bluefin submersible takes six times longer to cover the same area as the ping locator, and the two devices can't be used at the same time.\u003cbr/\u003eWorse still, the seafloor is about 4,500 meters (15-thousand feet) below the surface, which is the deepest the Bluefin can dive. \u003cbr/\u003e\"Anytime we push something to its limits you're always concerned about what the performance is going to be,\" said Matthews.\u003cbr/\u003eSearchers are also contending with a thick layer of silt on the bottom that is tens of meters deep in places, which could hide any debris that has sunk to the sea bed.\u003cbr/\u003eThe submarine will take 24 hours to complete each mission: two hours to dive to the bottom, 16 hours to search the seafloor, two hours to return to the surface, and four hours to download the data, according to Angus Houston, who is leading the search. \u003cbr/\u003eIn its first deployment, it will search a 40-square-kilometre (15-square-mile) section of seafloor.\u003cbr/\u003eA visual search for debris on the ocean surface was continuing on Monday over 47,600 square kilometres (18,400 square miles) of water about 2,200 kilometres (1,400 miles) northwest of the west coast city of Perth. \u003cbr/\u003eHouston said that the visual search operation would be ending in the next two to three days.\u003cbr/\u003e1. Wide of US Navy Captain Mark Matthews speaking to media\u003cbr/\u003e2. SOUNDBITE (English) Mark Matthews, US Navy Captain:\u003cbr/\u003e\"Based upon our broad searching with the Towed Pinger Locator, also based upon some of the returns that were achieved by the sonar buoys that were dropped, we've identified some areas that we prioritise to go evaluate with the site scan sonar search. So our mission right now is to go look at the higher priority areas and to see if there are any debris there, and just continue to keep hitting those small areas to see what we see on the bottom, potentially identify the source of the acoustic emissions that we received.\"\u003cbr/\u003e3. Close of Matthews  \u003cbr/\u003e4. SOUNDBITE (English) Mark Matthews, US Navy Captain:\u003cbr/\u003e\"The current depth that the system will be operating in is right at its rated maximum, so that is certainly a concern. That's what it's rated to operate into but anytime we push something to its limits you're always concerned about how the performance is going to be. The silty bottom we're also concerned about, but there's not much we can do to impact that, the results we get from the site scan sonar are going to be the results we get. Typically we do find debris sitting on top of silt, but it depends upon the density and the weight of the object.\"\u003cbr/\u003e5. 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