all divers accompanying them has been with them all this time. it is a tricky and dangerous operation it will be meticulously plums and you mentioned the neat saw huge stocks also acid and just throughout the route well that's been carried out by a very wide range of international divers a lot of european support divers there to ensure that there are fully recharged cylinders if not only require a lot of have to carry out a dive but if you can imagine the accession of maneuvering one of these children through some of the many quite can strip tit obstacles then the extra air is needed because you're just working that much harder so that was a key part of the plan is to integrate this restocking of our. now where did garrison at the time must be vital for the success of such an operation how do