- Greenwich Meridian — 2020-08-06 08:03:21
… tables that could be used by navigators and cartographers to establish positions at sea or on land. {{Image url="PrimeMeridianRoofOpen.jpg" class="right" title="Prime Meridian Roof Open" width="" }} == GMT == All clocks around the world are dete…
…the longitude offset from Greenwich Mean Time. Because the earths crust is always moving so will the imaginary prime meridian so it cannot be a truly fixed line. …