Definition

1. Noun:
   • A unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude. This is the international standard unit, also known as the "international nautical mile."
   • A former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile. This is an older, non-standard unit, also known as the "Admiralty mile" or "UK nautical mile."

Usage Examples

• Noun:
  • The ship was traveling at a speed of 15 naut mi per hour. (The ship was traveling at 15 nautical miles per hour.)
  • The distance between the two ports is approximately 120 naut mi. (The distance between the two ports is approximately 120 nautical miles.)
  • The old chart used the British naut mi, which is slightly longer than the international standard. (The old map used the British nautical mile, which is slightly longer than the international standard.)

Advanced Usage

• The term naut mi is an abbreviation for "nautical mile." In formal and technical contexts, the full term "nautical mile" is more common.
• The symbol M, NM, or nmi is often used in navigation and aviation to represent the nautical mile.
• The international nautical mile is defined as exactly 1,852 meters by international agreement. It is a critical unit in maritime and aerial navigation because it relates directly to the Earth's geometry (one minute of latitude).

Variants and Related Words

• Nautical mile (n): The full, formal term for naut mi.
• Sea mile (n): A less common synonym, sometimes used interchangeably.
• Knot (n): A unit of speed equal to one nautical mile per hour. (e.g., "The vessel's speed was 20 knots.")
• Statute mile (n): The common land-based mile, equivalent to 5,280 feet or approximately 1,609 meters. It is shorter than a nautical mile.

Synonyms

• International nautical mile: Specifically refers to the 1,852-meter standard.
• Admiralty mile: Specifically refers to the former British unit of 6,080 feet.

Related Phrases

• Per nautical mile: Used to express a rate or measurement over this distance. (e.g., "fuel consumption per nautical mile").
• Nautical mile of water: A phrase used in maritime law or descriptions of territorial waters.

Noun

1. a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude
2. a former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile