![]() And in particular, the replacement of the ordinary measurement with nautical miles and knots at sea helps the Mariners to read charts that use latitude and longitude quickly.Ĭurrently, the nautical mile developed from the geographical mile is used as the unit of measurement by all countries for air and sea navigation. Unlike measuring distance and speed on the ground, sailors use nautical miles and a knot for measurements during the sail.Īt sea, in navigational calculations, the statute mile is considered an arbitrary length of no particular significance. For navigators, while the land provides several fixed visible cues in the landscape, the sea does not leave any useful, distinguishing features.ĭue to this complexity, marine navigation has evolved significantly since the origin of humankind, finding various methods and measurements to save the life of mariners embarked on sea travel.įor many, the first encounter with the measurements being followed at sea raises eyebrows, wondering why they need to differ from miles and kilometres used while talking about land. The sea, with its vastness and unpredictable chaos within, always offers an uncertain journey for the captain and other sailors. It’s true that navigation in the open ocean is significantly difficult, unlike on land. Nautical fiction and other adventure stories are often filled with horrifying instances of ships being stranded at sea- due to storms and technical failures- not knowing the right direction.
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