What is a US survey fathom?

A US survey fathom is a non‑SI unit of length equal to 6 US survey feet, used mainly for measuring water depths and lengths in nautical contexts.

What does the UK nautical league represent?

The UK nautical league is a historical maritime unit equal to 3 nautical miles, used to express distances at sea in British navigation.

Why should I convert from fathoms to nautical leagues?

Converting helps reconcile historical nautical measurements and interpret distances in legacy hydrographic charts and maritime documents.

How to Convert from Fathom (US survey) [fath] to Nautical league (UK)?

Convert length measurements from the US survey fathom to the UK nautical league, a historical maritime unit. Useful for maritime navigation, hydrographic surveying, and historical chart interpretation.

Fathom (US survey) [fath]

Nautical league (UK)

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

Fathom (US survey) [fath] to Nautical league (UK) Conversion Table

Fathom (US survey) [fath]	Nautical league (UK)

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 league (UK) Conversion Table
Fathom (US survey) [fath]	Nautical league (UK)

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What Is This Tool?

This online converter transforms measurements from the US survey fathom, a unit used for nautical depths and line lengths, into the UK nautical league, a historical unit for expressing sea distances.

How to Use This Tool?

Enter the value in fathoms (US survey) you wish to convert.
Select fathom (US survey) as the input unit.
Choose nautical league (UK) as the output unit.
Click convert to see the equivalent length in nautical leagues.

Key Features

Converts length values from fathom (US survey) to nautical league (UK).
Supports historical and nautical measurement contexts.
Easy-to-use interface for quick conversion.
Browser-based tool requiring no installation.

Examples

10 fathoms (US survey) equals approximately 0.00328948 nautical leagues (UK).
1000 fathoms (US survey) converts to about 0.328948 nautical leagues (UK).

Common Use Cases

Reconciling water depth records on legacy hydrographic surveys.
Interpreting distances from historical British Admiralty charts.
Converting lengths of anchor cables or mooring lines for maritime analysis.
Researching nautical voyage distances from historical documents.

Tips & Best Practices

Verify measurements when working with legacy data due to differing definitions.
Use the tool primarily for historical or archival nautical measurement conversions.
Consult original sources when possible to cross-check survey data accuracy.
Be aware of slight differences between US survey fathoms and international fathoms.

Limitations

The US survey fathom differs marginally from the international fathom, affecting precision.
The nautical league (UK) is a historical unit not commonly used today.
Conversions are most relevant for archival and interpretative maritime research.
Rounding and differences in measurement standards may affect results.

Frequently Asked Questions

What is a US survey fathom?: A US survey fathom is a non‑SI unit of length equal to 6 US survey feet, used mainly for measuring water depths and lengths in nautical contexts.
What does the UK nautical league represent?: The UK nautical league is a historical maritime unit equal to 3 nautical miles, used to express distances at sea in British navigation.
Why should I convert from fathoms to nautical leagues?: Converting helps reconcile historical nautical measurements and interpret distances in legacy hydrographic charts and maritime documents.

Key Terminology

fathom (US survey): A unit of length equal to 6 US survey feet, used for measuring water depths and line lengths in nautical contexts.
nautical league (UK): A historical maritime length equal to 3 nautical miles, formerly used in British navigation to express sea distances.

Quick Knowledge Check

What is the US survey fathom primarily used for?

Measuring air pressure

Measuring water depths and nautical line lengths

Measuring distances on land

How many nautical miles equal one UK nautical league?

One nautical mile

Three nautical miles

Five nautical miles

Why is the UK nautical league considered a historical unit?

It is no longer in common use for modern navigation

It is still widely used today

It has been replaced by the fathom

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