Back on the historical oceans of Earth, a thousand years ago, there were all kinds of ships.

In 1971, the name changed again to "Queen's Park", to coincide with the public opening of the historical ocean liner RMS Queen Mary, which the city had purchased as a combination tourist attraction and hotel.

The narrative continues from the final scenes of both "Last of the Time Lords" and the mini-episode "Time Crash", when a luxury space cruiser called the Titanic, a pastiche of the historical ocean liner, breached the walls of the TARDIS.

Ocean reanalysis is a method of combining historical ocean observations with a general ocean model (typically a computational model) driven by historical estimates of surface winds, heat, and freshwater, by way of a data assimilation algorithm to reconstruct historical changes in the state of the ocean.