In nautical measure, nine inches is called a "span." The span is a unit of measurement used in maritime navigation to determine distances on a nautical chart. It is equal to nine inches or approximately 7.5 centimeters. The span is often used to measure the distance between two points on a chart or to estimate the size of objects seen through a ship's binoculars.

The use of the span dates back to the early days of sailing when navigators relied on simple tools and techniques to navigate the open seas. By using the span as a standard unit of measurement, sailors were able to quickly and accurately calculate distances without the need for complex mathematical calculations.

Today, the span is still used by sailors and navigators as a convenient way to measure distances on nautical charts. It is a simple and easy-to-use unit of measurement that is widely understood and accepted within the maritime community.

When using a nautical chart, sailors can easily convert distances measured in spans to other units of measurement, such as nautical miles or kilometers, using conversion tables or mathematical formulas. This allows them to accurately plot their course and navigate safely through the water.

Overall, the span is a valuable tool for sailors and navigators, helping them to navigate the open seas with precision and accuracy. By understanding the significance of the span and how it is used in nautical measure, sailors can ensure they have the knowledge and skills necessary to safely navigate the waters.

So, the next time you come across the term "span" in nautical measure, you'll know that it refers to a unit of measurement equal to nine inches. Whether you're a seasoned sailor or just have a love for the sea, knowing the meaning of the span can deepen your understanding of maritime navigation and the rich history of sailing.

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