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Updated with top tips! Quick and easy guide to understanding latitude longitude coordinates with TOP TIPS for plotting with a GPS and chartplotters. Topics include, What is latitude and what is longitude? How to plot coordinates. Where is the equator. Where is the Greenwich Meridian located. Placing a position on charts. Look up a latitude and longitude of a buoy from a paper chart. How to measure distances on a chart. One degree is equal to sixty minutes. Avoid mistakes when using the latitude scale for distances. More information and online courses at www.coastalsafety.com/online