Sonar Scanning News Today : Breaking News, Live Updates & Top Stories | Vimarsana

we're live with the latest. plus, taste the expletive out of the blue, a january 6th rioter who bragged about using a stun gun on police learns his fate from a judge. and the race against time in the atlantic, with less than a day's worth of oxygen inside a missing submersible, more ships are rushing to a search area two times the size of connecticut, hoping to find five people alive. our nbc news reporters are following all of the latest developments. i want to begin right there with the latest on the search and rescue with nbc's kristen dahlgren, we don't know for sure how long...

Heritage experts in England and France worked together to survey the Channel seabed and to trace vessels lost during Operation Dynamo.

Searching with side scanning sonar to find likely wreckage locations, and then drop underwater vehicles down to search him. dropping a diver down at 140 feet is dangerous to begin with but the bottom time for the diver, if it's a scuba diver s very limited. they've got to get underwater vehicles down on probable wreckage results from the sonar scanning. if they can't do that it's going to be a very drawn-out affair. >> david, give us some perspective. how much longer can the victims and the plane remain underwater before important clues are simply lost forever? >> well every minute that goes b...

Slow sonar scanning and a slow recovery, assuming you find wreckage. what kind of time period are we talking about here? >> well, i'll give uf some examples based on previous accidents in the indian ocean and in the java sea over there, adam air went in the java sea and that was in january. they found the wreckage about three weeks later. but they didn't get the black boxes until august. conversely, south african airways went into the indian ocean, the black boxes were under 16,000 feet of water. they got one of them. they only found one, but they got it on the second day. so, the bottom line ...