A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robert VanderPol II
Date: 2018 May 23, 12:12 -0700
Did the GPS tell you you were at some number degrees West longitude or did it tell you were some number of degrees from the Greenwich meridian?
GPS 0 degrees longitude is offset some number of meters from the Greenwich meridian
From: Jackson McDonald
Date: 2018 May 23, 10:44 -0700
Today I found myself in Washington and took these photos. According to my iPhone’s GPS, the American Meridian is situated at 77 degrees 3’ 5” west of the Greenwich Meridian. I wonder how accurate that is.