The Ship That Carried Einstein
SS Rotterdam — the fourth to carry the name — was built at Harland & Wolff in Belfast and entered service in 1908. At 24,149 gross tons, twin-funneled and twin-screwed, she served the Rotterdam-New York route for more than three decades: the prewar years, the First World War, the postwar recovery, the Depression, and into the years before the second war came.
In April 1921 she carried Albert Einstein to the United States. Einstein had been invited to lecture on relativity at American universities — the theory was still new enough to be controversial, the mathematics strange enough that most physicists were still working through the implications. He arrived in New York Harbour aboard the Rotterdam to a reception the ship had never previously produced: reporters and cameras and a crowd that had come to see the man whose ideas were rewriting the nature of space and time. Whether Einstein appreciated the crossing itself or simply endured it as the cost of being somewhere he needed to be, the record does not say. But he arrived, and what he brought with him changed physics.
The Rotterdam IV sailed for another two decades after that crossing, carrying ordinary passengers across an ocean that took six days and cost a week of your life to cross. Most of what a ship carries is unremarkable: people going from one place to another for ordinary reasons. The remarkable things are easier to name afterward. Hindsight is the only way to know what was important when it was happening. The Rotterdam IV carried a man with a theory, and the theory mattered.
— In the Wake editorial