Being deep below the surface with your life dependant on the equipment that you carry is the norm for divers, but imagine now that your survival is at the mercy of fate too. Swap your relative freedom for the confines of a submarine and experience the deep boom of depth charges exploding around your metal chamber. Feel the detonations vibrate through the metal as terrifying as thunder to a small child. The moment of impact trailed by a drenched dark silence as power fails and a dull thud announces your paralysis upon the ocean bed. The lucky submariners were killed instantly; the unlucky may well endure for a few more terrible hours. Asphyxiation as the oxygen runs out, drowning as the water seeps in or choking on chlorine gas as salt water drenches the massive batteries are the final trials of WWII submariner. Many US submarines never returned, some remain missing, while others were blown to pieces. In stark contrast, the Balao class submarine USS Lagarto lies in pristine condition in 72m of clear warm water in the Gulf of Thailand.