the bottom of the ocean. >> what you want to do first is map the entire accident scene. >> we spoke with former investigator with ntsb who worked on recovery and rebuilding of twa flight 800 that crashed after takeoff from new york city. >> you document everything until you really get the information off the data recorder and voice recorder. >> he said the site needs to be treated like a crime scene. mapping the debris field before removing objects could be key to finding out what happened. then comes the process of pulling up giant pieces of debris from the bottom of the sea. >> you have a number of lefting cranes and you would have teams of divers. the divers, of course even working 100 foot depth, decompression chambers. >> a potentially slow process because divers can only remain at depth for short periods due to health concerns. does indonesia have the know how