In May 1984, Marvin Creamer became the first and only man to circumnavigate the globe without the use of navigational instruments. He guided his sailboat, the Globe Star, around the world without so much as a compass or a watch.
Creamer mostly relied on celestial navigation—knowledge of the relative position of the sun, moon, and stars. However, clouds often obscured these natural waypoints. In these cases, Creamer used currents, wind patterns, the color of the ocean, and even marine animals to help identify his location.  
Use this GeoStory to investigate some of the points on the voyage of Marvin Creamer.