Secrets of the Viking Navigators: How the Vikings Used their Amazing Sunstones and other Techniques to Cross the Open Ocean
If "cutting edge" can be used in relation to Viking navigation, this information is definitely it. --Kristine Leander, Ph.D. Director, Leif Erikson International FoundationIf "cutting edge" can be used in relation to Viking navigation, this information is definitely it. --Kristine Leander, Ph.D., Director, Leif Erikson International FoundationKarlsen has done extensive research on the Viking sunstone and horizon board and explain how they work. --Dr. Alf Lunder Knudsen, Editor Emerituw Western VikingMost navigators have heard of Viking sunstones; few realize they are more than legend. Karlsen has brought them to life. --David Burch, Ph.D. Director, Starpath School of Navigation, Seattle, WAThis is an interesting, valuable, and educational contribution to the understanding of the Vikings’ success as navigators and seamen. --Dr. Alf Lunder Knudsen, Editor Emeritus Western Viking, The Norwegian Voice of America Since 1889