debris from the vessel discovered not far from the crew s planned destimation, the wreckage of the tay tannic. we have deep sea experts standing by. we ll also be taking a closer look at the five people onboard whose families and friends are now grieving. we ll be joined by guests who knew several of the passengers and understood their love of exploration and adventure. welcome to our viewers here in the united states and all around the world. wolf blitzer is off today. i m alex marquardt, and you re in the situation room. tonight the coast guard says it is continuing its investigation of the submersible and its implosion. the discovery of debris confirming everyone s worst fears, that the underwater expedition to see the ruins of the titanic had a disastrous end. our correspondents are at key locations covering the story from every angle. first, i want to go to miguel marquez who s in newfoundland. the debris field was found just off the coast of canada where you are just
survey period where they re likely going to have used something called an atoutonomou underwater vehicle which basically looks like a large torpedo and includes a side scan sonar in its belly getting returns back, and what that does is once it s brought back to the surface the data can be downloaded. the imagery is looked at, and people can pretty quickly find objects on the bottom that look promising, things like straight lines, right angles that are man made, not found in nature, pretty quickly would grab your attention. and once you have targets of interest, thain you re more likely to put down a remotely operated vehicle, which is sort of like a giant mini van looking device held by an umbilical that transmits data in realtime back to the surface with video cameras and gripper arms. so the people on the mother ship that deploy that, can then