Ro Type Vessel News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Diver showed us how air pockets can be found. >> when they're in a small compartment with an air bubble, they have to stay calm and breathe shallow and conserve the oxygen in that space. >> reporter: aside from the danger and difficulty of passengers trying to get to air pockets and close water-tight doors, bobby sculley says there's a danger of trying to pump air into an underwater vessel. >> you risk letting the air out of that compartment and allowing the ship to start to sink even more and that risks those survivors that might be in that situation. >> reporter: but sculley says south korea...

Mom has a headache! had a headache! but now, i& don't. excedrin is fast. in fact for some, relief starts in just 15 minutes. excedrin. headache. gone. rescuers think there still may be survivors in that sunking ferry. south korean crews are pumping oxygen into the ship just in case. though it seems a desperate effort, it is possible to survive such a catastrophe even if the ship has gone completely under the water. tom foreman has more for you. >> reporter: there's still a lot we do not know right now but we know some of the basics that started out this saga. it's a large vessel, about 7,000...

>> they're being charged undoubtedly with dereliction of duties and possibly attempted murder. what happened here was a complete dereliction of duty of the master, the captain of the vessel is always the master of everything that goes on in the vessel, the navigation and the personnel on the vessel. here, just look in costa concordia, we have a lot of instances of dereliction of d y duty. >> is it a requirement that the captain stay with the ship as long as there's anyone on board? >> carol, pretty much every law, rule, regulation and standard throughout the world says that, yes, the captain m...

Age-old rule, internationally recognized rule that the captain must stay on the vessel. there's a parallel here to the costa concordia which is strikingly similar to this. yes, this captain violated the age-old internationally accepted rule that the captain, because he or she is the master and the person who is supposed to supervise everything, that person is supposed to stay on the vessel and make sure everyone is off safely. >> obviously the investigation is under way as rescue efforts continue. what sorts of things are they looking for right now do you suppose? >> well, right now the -- wha...

>> what happens here, and i get back to the striking resemblance to the costa concordia disaster. what happened here is the vessel struck something. it struck a scholl or something in the water. there was a loud bang that was heard. eventually it listed and listed very severely. the captain did something which is by all accounts really horrible. that is he or someone else -- they're not sure whom was at the helm. it could have been this third officer at the helm at the time. but someone went on the pa system and announced and told everyone to stay in place, to keep calm and stay in place. that...