This is the limit speed, because there will be no more large mail ships installing the main engine of battleships in the future. The days when luxury mail boats came and went in the Atlantic for the Blue Ribbon Award are over.
Due to the appearance of jet passenger planes, the fate of large post-war mail ships has become obvious. The Cold War did not evolve into a hot war between the United States and the Soviet Union (except for the Cuban missile crisis of 1962, the American aircraft carrier was ready to be modified).
The United States keeps losing money to its owner, the American shipping company. 1969, the United States withdrew from the route operation and was entrusted by the US Federal Bureau of Maritime Affairs as a strategic reserve resource.
The American shipping company 1992 went bankrupt, and the United States was confiscated by the court and was ready for auction. A company called Comandor Company wants to buy this 40-year-old ship, redecorate it in Istanbul, and then sell it to Guanda Company to join Queen Elizabeth II in the Atlantic route in summer and the Caribbean cruise ship in winter. I have to mention the luxurious interiors in America and the restaurants on board.
But Guanda Company thinks that a luxury mail ship named Elizabeth II is enough. There seems to be only one way to disintegrate the fate of the United States waiting to be dragged to Istanbul. However, in 1996, Americans spontaneously established the "American Foundation" and dragged it back to the United States for preservation. Now it is moored at the Philadelphia Naval Base, and it is in the process of raising funds and repairing. The American mail ship has been registered as a national historical heritage in 1999.