Interesting factoid------ In making the movie "Titanic" they needed several shots looking back at the ship's wake. James Cameron wanted the film to be as accurate as possible in portraying the ship, and while CGI (computer generated imagery) is pretty amazing these days, water is just about the hardest thing to duplicate accurately with CGI. So they needed a real wake thrown by a real ship. The challenge was finding a ship that would put out a wake similar to the hull of the Titanic. The only ship they could find that put out the same kind of wake was a WWII Liberty ship. I have no idea which ship was used or where they shot it, but when you watch the movie the shots looking back at the ship's wake are actually of a Liberty ship's wake.
Another factoid of even less interest----- When WWII broke out in Europe, my father, who was a French citizen, was in Mexico. The order went out for all male French nationals who were overseas to return to France to help defend the country. My father, along with a lot of other Frenchmen, boarded a ship in Mexico and it set out for France. Later that day or the next day they got the word that France had fallen. So the ship turned around and returned to Mexico. My father eventually ended up in the San Francisco Bay area where, needing a job, he got one as a welder at a Kaiser shipyard building Liberty ships. Toward the end of the war he met my mother at a writer's conference in San Francisco.