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?
I've never heard of such a thing, but I do know about several incidents where a human error in using the autopilot system caused a radical turn at high speed resulting in injuries. A quick turn at high speed results in the ship heeling over to high angle of heel, with resultant injuries from passengers and things being thrown across the room. If this happened in a storm, the rolling/heeling would be greatly exaggerated.