1 American cable = 720 feet
1 league = 3 nautical miles = 1/20 degree
1 statute mile = 5,280 feet = 320 rods = 1,760 yards = 1.6 kilometers
1 nautical mile = 6,076 feet = 1,852 meters = 1 minute of latitude
1 furlong = 1/8 statute mile = 40 rods = 220 yards = 201.7 meters
1 degree of latitude = 362,753 feet = 20 leagues = 60 nautical miles
1 fathom = 6 feet = 1.82 meters
1 knot = 1 nautical mile per hour = 1.15 statute miles per hour = 101.27 feet per minute = 1.8 kilometers per hour
"Mr. Norwood, and several other able mathematicians, have found that a degree of a great circle upon the earth contains about 367200 English feet, therefore a nautical mile being the 1/60 part of 367200 feet, that is, 6120 feet, [...]" Mr. Hamilton Moore goes on to describe how to fudge a log-line by using fathoms of 5 or 5 1/2 feet.
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being an epitome of navigation, containing the different methods of working the lunar observations..._