There is more than one type of Nautical Mile
There are a few different types of Nautical Mile. On this site we have conversions for US Nautical miles, UK Nautical miles and International Nautical miles. Please either select the appropriate unit on the selection above of click the required unit in the links below:
What is a nautical mile?
A nautical mile is a unit of measurement used in navigation and maritime travel. It is defined as one minute of latitude along any meridian, making it a unit of distance that varies slightly depending on the Earth's shape. The nautical mile is commonly used in aviation and shipping industries due to its convenience in measuring distances over water.
Historically, the nautical mile was derived from the circumference of the Earth, with one minute of latitude being divided into 60 equal parts to create the nautical mile. This unit of measurement is particularly useful for sailors and pilots as it allows for easy calculation of distances based on the Earth's coordinates. The nautical mile is also used in international treaties and agreements related to maritime boundaries and navigation regulations.
What is a chain?
The chain is a unit of length measurement commonly used in surveying and land measurement. It is primarily used in countries that follow the imperial system of measurement, such as the United States and the United Kingdom. One chain is equal to 66 feet or 20.1168 meters. It is further divided into 100 links, with each link measuring 0.66 feet or 7.92 inches.
The chain was historically used for measuring large areas of land, such as farms or estates. Surveyors would use chains to measure distances between points and establish boundaries. The use of chains allowed for more accurate measurements compared to other methods available at the time. Today, the chain is still used in some specialized fields, such as civil engineering and land surveying, although it has been largely replaced by more modern and precise measurement tools like GPS.