What is a nautical league (UK)?

It is a historical maritime length unit equal to 3 nautical miles or approximately 5,556 metres, used in British navigation.

What is the US survey fathom used for?

The US survey fathom measures water depths and line lengths in nautical and hydrographic contexts.

How to Convert from Nautical League (UK) to Fathom (US Survey) [fath]

Q: Why convert from nautical league (UK) to fathom (US survey)?

To interpret historical maritime measurements in units useful for hydrographic surveying and legacy data reconciliation.

Learn how to convert length measurements from the historical UK nautical league to the US survey fathom unit commonly used in maritime and hydrographic contexts.

Nautical league (UK)

Fathom (US survey) [fath]

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

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

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

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.

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

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What Is This Tool?

This converter allows users to translate measurements from the historical UK's nautical league, a maritime distance unit, into the US survey fathom, a nautical length measure often used for water depths and line lengths.

How to Use This Tool?

Enter the value in nautical leagues (UK) you want to convert
Select nautical league (UK) as the source unit and fathom (US survey) as the target unit
Click the convert button to get the equivalent length in fathoms (US survey)

Key Features

Converts nautical league (UK) to fathom (US survey) with precise legacy conversion rates
Supports maritime and hydrographic applications involving historical and modern data
Browser-based and easy to use for research and nautical chart interpretation

Examples

2 Nautical leagues (UK) equals 6079.98784 Fathoms (US survey)
0.5 Nautical league (UK) equals 1519.99696 Fathoms (US survey)

Common Use Cases

Converting historic British Admiralty chart distances to fathoms for hydrographic surveys
Interpreting maritime voyage lengths from old ship logs into useful modern units
Translating legacy nautical data for marine navigation and oceanographic research

Tips & Best Practices

Ensure you use exact legacy values when converting to maintain consistency
Be aware of slight differences between US survey fathom and international fathom when comparing data
Use this tool primarily for historical and legacy data conversions rather than modern active units

Limitations

The nautical league (UK) is a historical unit no longer in regular use, which may lead to inconsistent data
The US survey fathom slightly differs from the international fathom, causing minor discrepancies
Conversion assumes exact legacy unit definitions and does not account for historical measurement variations

Frequently Asked Questions

What is a nautical league (UK)?: It is a historical maritime length unit equal to 3 nautical miles or approximately 5,556 metres, used in British navigation.
What is the US survey fathom used for?: The US survey fathom measures water depths and line lengths in nautical and hydrographic contexts.
Why convert from nautical league (UK) to fathom (US survey)?: To interpret historical maritime measurements in units useful for hydrographic surveying and legacy data reconciliation.

Key Terminology

Nautical league (UK): A historical British maritime unit of length equal to 3 nautical miles or about 5,556 metres.
Fathom (US survey) [fath]: A non-SI length unit equal to exactly 6 US survey feet (~1.8288 metres), used in hydrographic measurements.

Quick Knowledge Check

What is the length of one nautical league (UK) in terms of fathoms (US survey)?

Approximately 3,040 fathoms

Exactly 1,852 fathoms

Roughly 6,000 fathoms

Which unit is primarily used to measure water depth?

Nautical league (UK)

Fathom (US survey)

Nautical mile

Why might there be discrepancies when converting nautical league (UK) to fathom (US survey)?

Because the fathom (US survey) and international fathom differ slightly

Because the nautical league (UK) is still widely used in modern navigation

Because fathoms are larger than nautical leagues

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