A presentation of the 2012-13 Fara Heim Expedition of Re-Discovery
- We talked about how Iceland spar “sunstone ” may have been used for navigation.It may be that the “sunstone ” was used by taking advantage of it’s ability to split light. This created the opportunity to locate the light coming directly from the sun even in fog or cloud.
0 comments Sunday 27 May 2012 | Johann | Expedition Diary
