Can't blame the Scum, really, as all the journo's have picked up on the i-pod thing, but the navigator was off watch at the time, and should have by rights been tucked up in his farter. The control room team, on the other hand, should have been far more situationally aware considering the water they were in at the time, and the XO in particular should shoulder a lot of the blame. All the bitching about the enlisted men is pretty much a smokescreen, the main culprits were the plot, the periscope watchkeeper, the watchleader and the XO. Everyone else is merely collateral damage.