back to birmingham where doctors then diagnosed with a rare form of leukaemia. since lastjuly, it has been held. i don t think there has been a week that has passed we have not been in hospital. i think the most we ve done is about three or four days. she the most we ve done is about three or four days. three or four days. she is at stem transponders - three or four days. she is at stem transponders but - three or four days. she is at | stem transponders but none three or four days. she is at - stem transponders but none have awoke. the medical team said they are not prepared to do a third one. they are not prepared to do a third one- they are not prepared to do a third one. ., ., ,, . third one. have worked. we were not third one. have worked. we were not seeing third one. have worked. we were not seeing counts - third one. have worked. we were not seeing counts come l third one. have worked. we i were not seeing counts come up, i was getting really worried. i started t
transponders off, violating international regulations. last year there were nearly 600 intercepts. we flew over europe in a refueling tanker. they are super close. i can make out the pilots in the cockpits. as nato fighter jets practiced intercepting us. all alone unescorted and flying the same air space, they could potentially have a midair collision. reporter: major general harold told us the baltic sea is a hot spot with russia on one shore as well as several of america s nato allies, including estonia, a tiny nation, smaller than west virginia, with the population of just over 1 million. when you have a bully in school, then the bully does not bully you when you have big friends. and this is the way nato works. reporter: on the ground, we
that the transponders on board are not working. they would note that they need to make some sort of regular noise that would not be misinterpreted. so one is hoping that that is what they are picking up. that tells us two things, first that they are still alive that the vessel itself, titan, did not get crushed by the pressure, but also it helps the rescuers focus and to the area. sound travels a long way in the ocean, it can travel hundreds of kilometres. and it also travels very fast, 1500 metres per second. that is five times the speed of sound in the air. so it is a really good technique to detect things. the problem is you cannot pinpoint it very accurately. so it gives a broad search. , very accurately. so it gives a broad search. 3 , very accurately. so it gives a broad search. , , , ., very accurately. so it gives a broad search. , , ,., search. let s pick up on exactly that thought search. let s pick up on exactly that thought because search. let s pick up on exactly -
to the top of mt. everest. the question is, the skill, not just to the people involved, but the operation itself. for instance, i was reading its communication is basically a one text message system. doesn t appear to be a fail safe. i don t know if transponders are available at this depth that would give you passive communication if you go missing. you run sea dyes. does this have the safety measures that you would have in place? return would hope so. the dives i m doing the wouldn t be the same. the risk is much greater at these depths. we look at the vessel, carbon fiber, titanium, people inside
back like a champagne cork. i don t know if that s the case. if it hasn t done that, what do you expect might be from doing are that? i ve been thinking about that. something like this has a lot of different penetrations. when i say penetration, pieces with cables and pipes. if they re on the way down to the bottom and something like that started leaking, under high pressure, that will be a big problem. so if there s something on the bottom you know, these submarines have what is called a gertrude. under water telephone. if they still have power, they should be able to communicate with the surface ship. they should have tracking beacons called transponders, which are basically interrogated or talked to from the surface ship and they respond back and they tell you, okay, this is where the submarine is. but the fact that they have her nothing and no communications is