Just for you to note as well....

Nautical miles measure distance :) 1 nautical mile is the angular distance of 1 minute of arc on the earth's surface. As these differ slightly (6108' at pole c.f. 6046' at equator) 6080 was adopted (this being its approximate value in the English Channel). The International nautical mile is 1852 meters, so is very slightly different from the UK nautical mile.
1 UK nautical mile = 1.00064 international nautical miles
If you want an irrelevant fact, one minute of arc on Mars is close to a kilometer (.987 km to be more accurate).

6080 feet = 1 nautical mile

*the internet is good for interesting information on this kind of stuff* (yay for internet!)