A perfect example of natural navigation from the Vikings!
http://www.realclearscience.com/articles/2012/10/12/how_vikings_navigated_the_globe_106385.html
If you are interested in how to get about without satnavel-gazing or compass, then look to Tristan Gooley who runs courses and has a great website of resources
http://www.naturalnavigator.com/
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