Sagas modern Spirit of Discovery was caught in a severe storm a few days ago resulting in the injury of about 100 passengers including several hospitalisations. Reports state that the sudden ship movement was the result of the activation of the "automatic propulsion safety system" making the ship veer to the left and come to a sudden halt. What sort of automatic system is this and why would it result in many injuries?
Good to see the MAIB have opened an investigation, confirming it was a loss of propulsion as mentioned by chengkp75 above.
https://www.gov.uk/government/publications/marine-accident-investigation-branch-current-investigations/marine-accident-investigation-branch-current-investigations