Before GPS or the directional app, how did navigators and explorers, sail safely across ocean waters?  Early marine navigation was accomplished through use of the trusted cross-staff, back-staff, sexton and octant.  Speaker Douglas Sheer, recalls the long ago methods of marine navigation and how to use the stars to find a desired destination.

Mr. Sheer is a licensed captain and historian of naval navigation.  He won a National Endowment for the Humanities Award to study celestial navigation in Greenwich, England.  Mr. Sheer is a "Friends of Rock Hall" board member and the president of the Long Beach Island Landmarks Association.  Space is limited and reservations are required.