# How fast is 20 knots?

**What nautical mile is?**

A nautical mile is a unit of length used in marine navigation and maritime law. It is based on the circumference of the Earth, which measures just over 21,000 nautical miles around the Equator. The mile nautical is approximately equal to 1 minute of arc of latitude along any meridian. In other words, one nautical mile can be divided into 60 equal parts, each part representing one minute of arc. The nautical mile is used for measuring distances between two points on the surface of the Earth, usually along great circles or rhumb lines. It’s also used to indicate speed in knots (nautical miles per hour). Nautical miles are used by sailors and pilots alike when navigating through large bodies of water or airspace. Nautical miles are slightly longer than a standard miles.

**Miles per hour and other units involved**

The United States Customary Unit (USCU) is widely used in maritime and air navigation, where it defines the units of measurement for speed limits. This system is based on the English system which uses feet, miles, yards and gallons as its standard units. Speed limits are measured in knots, which is equal to one nautical mile per hour. Additionally, USCU also defines the measurements for fuel consumption and other trade measures such as depth and width within ships. It has become the most popular measuring system used in both maritime and air navigation due to its easy conversion from other systems. The USCU system helps ensure safety in all forms of transportation by providing a standardized method for measuring limits of speed. With this reliable unit of measurement, travelers can be sure that their travels will be safe and efficient.

**Conversion table for knots and miles – how to calculate knots versus miles**

Table providing conversion for knots and miles is a great tool to have when converting one unit of measurement to the other. To calculate knots versus miles, you need to know that 1 knot equals to 0.87 of a mile. To convert from knots to miles, multiply the number of knots by 0.87. To convert from miles to knots, divide the number of miles by 0.87. For example, if you want to convert 10 knots into miles, you would multiply 10 by 0.87, which would make 8.7 miles. Similarly, if you want to convert 17 miles into knots, then you would divide 17 by 0.87 which would be 19.54 knots. Itâ€™s important to remember that the conversion table for knots and miles is only an approximation as air pressure and temperature can affect the speed at which a vessel travels over water or air

**To sum up – twenty knots into miles:**

1 knot equals 0.87 mile

10 knots = 10 x 0.87 = 8.7 mile

20 knots = 20 x 0.87 = 17.4 miles

To learn more about knots check article How fast is 1 knots.

**Speed expressing**

Speed is a measure of how quickly an object or vessel is travelling, often expressed in miles per hour (mph). It is the most widely used measure for long distances, and is the standard unit for measuring speed. Whether it’s a car on the highway, a train on its tracks, or a boat on the ocean, mph is used to accurately calculate how far something has moved in an hour. As technology has advanced, other metrics have been developed to measure even faster speeds like kilometres per second. But mph remains the standard for measuring distance over time, and will likely remain so for many years to come.

**Non SI unit**

Geographic latitude is a non-SI unit that describes the distance from the equator, in an angle of approximately one minute. This measurement is used to determine location on the Earth, with zero degrees representing the equator itself. Geographic latitude can be measured using a sextant or a GPS system, allowing for accurate navigation over long distances. It can also help sailors determine their current location when combined with other methods such as astronomical observations and dead reckoning. All these measures have been used for centuries by mariners and navigators alike to explore the vast oceans of our world.