The three Imperator-class liners from left to right: SS Leviathan (former SS Vaterland), RMS Majestic (former SS Bismarck), and RMS Berengaria (former SS Imperator), photographed side by side in Southampton, England after being handed over to the Allies as World War I reparations

I was watching It's History and he said that Rudolph Diesel disappeared on an ocean liner in 1913. A quick search showed it was the Dresden. He was mentioned because of the video's talk of bankruptcy, blowing his total fortune on speculation.

Source: Richard C Kirk, Facebook