Meridian Meaning in Sailing

A meridian is an imaginary line running from the North Pole to the South Pole. These vertical lines help navigators measure the longitude or the east-west position of a boat. Every location on Earth sits on a specific meridian measured in degrees from Greenwich, England. A navigator uses the local meridian to calculate the exact time of noon at sea. This measurement is essential for determining the distance traveled across the vast open ocean. Maps show these lines to help sailors plan long routes between different global continents. Understanding meridians allows a crew to stay on course during a long international voyage. This coordinate system provides a universal way for all mariners to communicate their exact location.