International Nautical League
The international nautical league is a standardized version of the nautical league used in maritime navigation. It is defined as exactly 3 international nautical miles, which equals 5,556 meters or about 3.45 miles. This standardization helps avoid confusion caused by variations in historical definitions of the league. While the nautical mile remains the primary unit in modern navigation, the international nautical league provides a consistent way to measure longer distances at sea when needed.
Earth Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole. It measures the Earth’s radius along its rotational axis.
Its value is approximately 6,356.8 kilometers (about 3,949.9 miles).
The Earth is an oblate spheroid, so the polar radius is slightly shorter than the equatorial radius due to the planet's flattening at the poles.
This measurement is crucial for geodesy, understanding Earth’s shape, and satellite navigation.
Key facts:
Polar radius ≈ 6,356.8 km
Smaller than equatorial radius by about 21.3 km
Important for precise Earth modeling and mapping
The difference between the polar and equatorial radius reflects the Earth’s rotation and its effect on the planet’s shape.
No conversions available for length.