Hi there!
By definition, disasters can also be triggered by war, terrorism or similar events. A general listing of the events with the greatest numbers of losses is in so far quite common. It is nevertheless useful to divide maritime disasters for more accurate classification in civilian disasters and war events.
Against this background, the 'Wilhelm Gustloff' with a loss of 9000-12000 souls is the worst event of a single ship at all - followed by the also war related sinkings of the 'Goya', the 'Junyo Maru', the 'Toyama Maru', the 'Armenija', the 'Ryusei Maru', the 'Tamatsu Maru' and the 'Cap Arcona '.
The worst civilian single event of one vessel is still the sinking of the 'Do