In 1948, a young Australian mining engineer named Ben Carlin set out to do the impossible: circumnavigate the globe, by land and sea, in a single vehicle. The vehicle in question was an amphibious jeep developed by the U.S. Army, which Carlin christened Half-Safe, after a deodorant slogan. It was a mechanical mongrel that was supposed to move with equal ease across land and water but in practice wasn't much good for either one.
Undaunted, Carlin and his wife Elinore set out from New York with dreams of fame and fortune, and of carving a small notch in history. What happened next is one of the most bizarre, remarkable, and forgotten adventure stories of the 20th century.