The way this was reported by the local police was slightly different.
As the sub cleared the breakwater, a large wave knocked 4 of the sailors off the casing.
As is usual in British ports, two Ministry of Defence vessels were escorting the boat out of harbour and they picked up all of them in double quick time.
However, two of them were already too far gone and although the MoD crew performed CPS on them all the way back into port, they were pronounced dead at the hospital.
The 2 survivors are in the sick bay at HMS Drake, the local stone frigate.
The submarine was unable to turn round to collect them or even take part in the inquiry as the weather was too bad. Once the weather has abated, the boat will come back into Plymouth.
Kelvin