The lea is a unit of distance that is traditionally used in maritime contexts, particularly in navigation and cartography. It varies in length depending on the specific context and region, but it's often associated with the old navigation practices. In its most common form, a lea is understood to be approximately three nautical miles or about 5.6 kilometers (3.5 miles). The term has historical significance and is not commonly used in modern measurements, as nautical miles and kilometers are more standard in maritime navigation today.
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