from the first paragraph:
"Since the earth is 360 degrees of longitude around, and degrees are broken into 60 so-called "minutes"...... by definition, 1 minute of longitude at the equator is equal to 1 nautical mile. "
i guess there's really no definition to it...
1 nautical mile = 1.85200 kilometers = 1.1508 miles = 6,076 feet
-Lok