Operation Manual
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113
Known Factors: Speed: 40 miles per hour Distance: 
10 nautical miles
•  Align “40” on the outer ring with the mark “MPH” 
marking on the inner ring.
•  The time required can be found directly below the “10” 
arrow on the outer ring, which is “15” on the inner ring.
The answer: 15 minutes
DISTANCE CALCULATION: 
How far can you travel at 40 miles per hour for 
15 minutes?
Known Factors: Speed: 40 nautical miles per hour Time: 
15 minutes
•  Align “40” on the outer ring directly above the mark 
“MPH” on the inner ring.
•  The distance travelled can be obtained above the “15” 
marker on the inner ring. The number indicated on the 
outer ring is “10”. 
The answer: The distance travelled is 10 nautical 
miles.
UNIT CONVERSION: 
To convert distance from nautical miles to statute miles 
and kilometers.
Known Factor: Distance to convert is 10 nautical miles
•  Align the “10” arrow on the outer ring above the 
“NAUT” on the inner ring. The conversion in statute 
miles (11.5) is found above the inner ring “STAT” mark-
ing, and the conversion to kilometers (18.5) is found 
above the inner ring “MPH” marking.










