The sad sinking of the General Belgrano in the Falklands War is a classic primer. Except for the initial casualties from the torpedo the crew made it into lifeboats. There is even a photograph of the Captain and a remaining officer leaping from the bow as she went down. Rescue located all but a few liferafts which succumbed to high seas. Further casualties were in lifeboats with only a few occupants. The inability to huddle and utilise body heat killed them with hypothermia.