they're getting a sense for where bodies are located inside the vessel. what are they figuring out based on that, about how this ship possibly went under water? what are the positioning of the bodies telling investigators? >> reporter: we had heard all along people on board were told where to stay for a long time. what appears to have happened is many of the students at least seemed to have gathered together. this group of 48, mostly girls, were all gathered in a room only large enough for about 30 people which gives you an indication they were clustering together, afraid, not sure what to do. divers believe there is another room that may hold another 50 young students in it. so, it does appear that in this period of uncertainty, some of them were clustering together. and not apparently able to follow direction, if any was given or not given direction,