Latitude      Changed   Knowledge of the World  What Changed

Without Latitude   In 1440 European Sailors Only   Knew    But With Latitude   In 1516 They Knew                  Ships Beacons Maps Latitude Compass Roses Earth's Magnetism Traditional Sailing Science of Sailing Coastal Navigation Ocean Currents Ocean Weather Longitude Polynesian Astronomy Math in Maps Calendars Site Map Net Resources Learning Page    Portuguese Latitude Scale circa 1516  (blue/red rectangles, approx. double actual size)          Send Comments sepia maps © Huntington Library  Why world navigation was impossible in 1421 Last modified 9/8/2002 © 1998-2000 p seed