Nautical Mile
nmi
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The nautical mile is uniquely defined in terms of the Earth's circumference and is the standard measurement for distances traveled at sea and in aviation. One nautical mile is equivalent to one minute of arc along a meridian.
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Nautical Mile (nmi)
The nautical mile is uniquely defined in terms of the Earth’s circumference and is the standard measurement for distances traveled at sea and in aviation. One nautical mile is equivalent to one minute of arc along a meridian.
Characteristics
- Maritime and aviation standard (international)
- 1 nmi = 1,852 meters (exact international definition)
- Based on Earth’s circumference: 21,600 nautical miles = Earth’s circumference
- Always used with: knots (nautical miles per hour)
Conversions
- 1 nmi = 1.852 km
- 1 nmi = 1852 m
- 1 nmi = 1.15078 statute miles
- 1 nmi = 6076.12 feet
- 1 nmi = 2025.37 yards
- 1 knot = 1 nautical mile per hour
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Maritime Aviation International