What is a US survey fathom?

It is a non-SI length unit used in maritime contexts, equal to 6 US survey feet or approximately 1.8288 meters, mainly for measuring water depths.

How is the international nautical mile defined?

The international nautical mile is exactly 1,852 meters and is commonly used to measure distances in navigation and oceanography.

Why convert from fathoms to nautical miles?

Conversion helps translate legacy depth measurements into standard navigational distances for modern marine and aeronautical applications.

How to Convert from Fathom (US survey) [fath] to Nautical mile (international)?

Learn how to convert lengths from the US survey fathom unit to the international nautical mile for accurate maritime and hydrographic measurements.

Fathom (US survey) [fath]

Nautical mile (international)

Please check your input. It must be a valid numeric value.

Fathom (US survey) [fath] to Nautical mile (international) Conversion Table

Fathom (US survey) [fath]	Nautical mile (international)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Fathom (US survey) [fath] to Nautical mile (international) Conversion Table
Fathom (US survey) [fath]	Nautical mile (international)

Explore More Length Units Converter

What Is This Tool?

This converter allows users to transform length measurements between the US survey fathom and the international nautical mile. It is designed to facilitate the translation of legacy hydrographic and nautical depth data into standardized modern units used in navigation and marine charting.

How to Use This Tool?

Enter the length value in fathoms (US survey) you wish to convert
Select the target unit as nautical mile (international)
Click the convert button to see the equivalent measurement in nautical miles

Key Features

Converts length from US survey fathoms to international nautical miles easily
Based on precise defined conversion rates for accurate results
Supports maritime and hydrographic use cases involving water depth and navigation
Browser-based and user-friendly interface suitable for legacy data reconciliation

Examples

10 fathoms (US survey) converts to 0.00987475 nautical miles (international)
50 fathoms (US survey) converts to 0.04937375 nautical miles (international)

Common Use Cases

Translating water depth measurements from legacy surveys to modern navigation charts
Specifying lengths of anchor cables and mooring lines using standardized units
Integrating historical hydrographic data with current global positioning and mapping systems

Tips & Best Practices

Verify the context of measurements to confirm the use of US survey fathoms versus international fathoms
Use this converter when working with legacy or historical maritime data for consistency
Cross-check converted values when precision is critical due to slight unit differences

Limitations

The US survey fathom differs slightly from the international fathom, affecting conversion accuracy
Legacy data using US survey units may present rounding errors when converted
This tool does not address differences in non-length units or other measurement systems

Frequently Asked Questions

What is a US survey fathom?: It is a non-SI length unit used in maritime contexts, equal to 6 US survey feet or approximately 1.8288 meters, mainly for measuring water depths.
How is the international nautical mile defined?: The international nautical mile is exactly 1,852 meters and is commonly used to measure distances in navigation and oceanography.
Why convert from fathoms to nautical miles?: Conversion helps translate legacy depth measurements into standard navigational distances for modern marine and aeronautical applications.

Key Terminology

Fathom (US survey): A unit of length equal to 6 US survey feet, used in measuring water depth and line lengths in maritime contexts.
Nautical Mile (International): A unit of length defined exactly as 1,852 meters, used for geodetic and navigational distances.
Conversion Rate: The factor used to translate one unit of length into another; here 1 fathom (US survey) equals 0.000987475 nautical miles (international).

Quick Knowledge Check

What is the length of one US survey fathom in terms of feet?

5 US survey feet

6 US survey feet

10 US survey feet

How many meters are in one international nautical mile?

1852 meters

1500 meters

2000 meters

What is a common use for converting fathoms to nautical miles?

Measuring aircraft altitude

Translating legacy marine depth data

Calculating land distances

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