Tramp Royale is a nonfiction travelogue by science fiction writer Robert A. Heinlein, describing how he and his wife, Ginny, went around the world by ship and plane between 1953 and 1954.

Much of the book is devoted to social and political commentary and observation, including two lengthy but half-hearted defenses of the McCarthy hearings, about which the Heinleins were interrogated repeatedly in the countries they visited.

[2] Heinlein devoted an entire chapter to his (almost) visit to Tristan da Cunha, arguably the most remote human settlement on Earth.

This trip, along with Heinlein's experiences as a naval officer, appears to have provided a great deal of the background material for some of Heinlein's science fiction novels, such as passenger liners used in Podkayne of Mars (in space) and in Job: A Comedy of Justice (on the oceans).

For example, in a shipboard incident at the captain's table, Robert continues eating his dessert after being doused in salad during a food fight started by Ginny.