How long is one marine league?

One marine league is defined as 3 nautical miles. This unit of measurement has historical significance and is derived from the distance a person can travel by sea in one hour. The marine league was traditionally used in maritime navigation and is still referenced in specific legal contexts today.

In terms of geographical distances, a nautical mile is based on the circumference of the Earth and is equal to one minute of latitude. Therefore, knowing that a marine league consists of 3 of these nautical miles helps in understanding nautical charts and navigation at sea. This knowledge is crucial, particularly for surveyors and maritime professionals who need to navigate and measure distances accurately in marine environments.