Which unit equals one nautical mile?

• A. Degree
• B. Minute
• C. Second
• D. Range

Answer: (B)

One nautical mile is defined as one minute of latitude along a meridian. That means the unit that equals exactly one nautical mile is the arc-minute (minute) of latitude. Since 1 degree equals 60 minutes, 1 degree corresponds to 60 nautical miles, and 1 second is 1/60 of a minute (much smaller). So the minute is the precise unit that matches one nautical mile. In navigation, distances are often given in nautical miles because they align with how latitude is measured.