U.S. Navy helicopters returned fire, sinking three of the four boats and killing the crews.
Three of the five had been released from local hospitals as of Friday afternoon, officials said.
One junior sailor reported that he had seen his chief “maybe five times in two years," according to the investigation.
The Navy is considering extending the lives of a few Ohio-class submarines in fiscal 2025 to hedge against any delays as the Columbia class is built.
