Convert Fathoms to Nautical Miles

Convert Fathoms (ftm) to Nautical Miles (nmi) instantly and accurately.

Conversion Formula

nmi = ftm × 0.0009874730022

About Fathoms

A fathom (ftm) is equal to 6 feet or 1.8288 meters, traditionally based on the span of a man's outstretched arms. This unit has been used for centuries in maritime navigation to measure water depth and rope or cable lengths. While largely replaced by meters in modern nautical charts, fathoms remain in use by sailors and in naval traditions. The Mariana Trench, Earth's deepest point, reaches about 6,000 fathoms. The term 'to fathom' meaning 'to understand' derives from this nautical unit.

About Nautical Miles

A nautical mile (nmi) is equal to 1,852 meters or approximately 1.15078 statute miles, based on one minute of arc along Earth's meridian. This unit is the standard for maritime and aviation navigation worldwide because it directly relates to Earth's geometry, making navigation calculations simpler. Ships and aircraft measure speed in knots (nautical miles per hour). The distance between parallels of latitude is almost exactly 60 nautical miles. International maritime law uses nautical miles to define territorial waters and exclusive economic zones.

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