"Navigation puzzles, controversies, historical problems, and other ponderables demystified by an expert navigator and writer. Joe Portney is a US Naval Academy

The 12th edition of this bestselling book is proof of the success of Mary Blewitt's concise and clear style in explaining a particularly difficult skill, and it

Most navigators have heard of Viking sunstones, but few realize they are more than legend. Leif Karlsen has brought them to life. He shows us how they work--now

Matt's chances of making the Evergreen Racing Team are seriously threatened when Tyler moves into town.

-- Features many new charts and illustrations -- New contact information for purchasing maps in the U.S. and Canada This tried-and-true guide teaches practical