A long reed is a traditional unit of length formerly used for land measurement and local surveying, with its exact size varying by location and time period.

How does the UK nautical mile differ from the international nautical mile?

The UK nautical mile is defined as exactly 6,080 feet or 1,853.184 metres, making it slightly longer than the international nautical mile of exactly 1,852 metres.

Why convert long reeds to UK nautical miles?

Converting helps interpret and reconcile historical land and maritime measurements with modern standard units, especially for research, restoration, and navigation.

Convert Long Reed to Nautical Mile (UK) [NM (UK)]

Easily convert length measurements from the historical unit long reed to the UK nautical mile (NM UK) for accurate interpretation of old surveying and maritime records.

Long reed

Nautical mile (UK) [NM (UK)]

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Long reed to Nautical mile (UK) [NM (UK)] Conversion Table

Long reed	Nautical mile (UK) [NM (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.

Long reed to Nautical mile (UK) [NM (UK)] Conversion Table
Long reed	Nautical mile (UK) [NM (UK)]

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What Is This Tool?

This converter transforms values measured in the traditional long reed unit into the UK nautical mile (NM UK), a historical maritime length measurement. It supports users working with legacy land and nautical data by providing a standardized way to interpret these obsolete measures.

How to Use This Tool?

Enter the value measured in long reeds in the input field.
Select the conversion target as UK nautical mile (NM UK).
Click the convert button to see the equivalent distance in NM (UK).
Use the results to interpret or compare historical measurements.
Apply the conversion for restoration, research, or navigation projects.

Key Features

Converts from long reed, a variable historic unit of length, to UK nautical miles.
Supports interpretation of historical land deeds, maps, and maritime logs.
Uses established conversion rates based on historical definitions.
Browser-based and easy to use without requiring complex formulas.
Helps reconcile old surveying measurements with modern units.

Examples

Converting 10 long reeds yields approximately 0.017269737 NM (UK).
Converting 100 long reeds results in approximately 0.17269737 NM (UK).

Common Use Cases

Interpreting distances in historical UK Admiralty navigation charts.
Translating old surveying units into modern equivalents for land boundary recovery.
Restoring and comparing older maritime data and instruments to current standards.
Conducting historical or linguistic research into regional measurement systems.
Converting maritime distances in legacy legal and archival documents.

Tips & Best Practices

Verify the historical context to select the correct long reed definition before converting.
Remember the UK nautical mile differs slightly from the international standard; apply conversions accordingly.
Use the tool to assist with research, restoration, and maritime history projects.
Cross-reference results with historical sources for accuracy in legacy data interpretation.

Limitations

The long reed's exact length varied depending on locality and historical period.
Conversion accuracy depends on the specific historical source used.
The UK nautical mile is slightly longer than the international nautical mile; direct comparisons require caution.

Frequently Asked Questions

What is a long reed?: A long reed is a traditional unit of length formerly used for land measurement and local surveying, with its exact size varying by location and time period.
How does the UK nautical mile differ from the international nautical mile?: The UK nautical mile is defined as exactly 6,080 feet or 1,853.184 metres, making it slightly longer than the international nautical mile of exactly 1,852 metres.
Why convert long reeds to UK nautical miles?: Converting helps interpret and reconcile historical land and maritime measurements with modern standard units, especially for research, restoration, and navigation.

Key Terminology

Long reed: An obsolete unit of length formerly used in land measurement and local surveying, varying in size by locality and historical period.
Nautical mile (UK): A historical UK maritime unit of distance defined exactly as 6,080 feet or 1,853.184 metres, slightly longer than the international nautical mile.

Quick Knowledge Check

What was the long reed primarily used for historically?

Maritime distance measurement in international shipping

Land measurement and local surveying

Measuring aircraft altitude

How long is the UK nautical mile defined as?

Exactly 1,852 metres

Exactly 1,853.184 metres

Exactly 6,000 feet

Why must care be taken when comparing UK nautical miles to international ones?

They use a different unit system altogether

The UK nautical mile is slightly longer than the international one

The UK nautical mile is only used for land measurements

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