What Is This Tool?
This converter transforms lengths from the UK nautical mile, a legacy maritime unit, into perch, a traditional unit largely used in surveying and land measurement. It helps reconcile and understand historical measurement records by providing precise conversions.
How to Use This Tool?
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Enter the length value in nautical mile (UK).
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Select the 'nautical mile (UK) [NM (UK)]' as the source unit.
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Choose 'perch' as the target unit.
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Click the convert button to get the result instantly.
Key Features
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Converts lengths from nautical mile (UK) to perch accurately based on historical values.
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Supports interpretation of maritime navigation and legacy surveying measurements.
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Browser-based tool requiring no installation for immediate use.
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Allows quick unit conversion useful for legal, cadastral, and archival purposes.
Examples
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1 NM (UK) converts to approximately 368.48 perch.
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2 NM (UK) converts to about 736.97 perch.
Common Use Cases
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Interpreting distances from historical UK Admiralty maritime charts.
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Converting legacy legal land documents and cadastral records.
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Restoring measurements on old navigation tools and estate plans.
Tips & Best Practices
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Verify the historical context of records before converting units.
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Cross-check converted values when working with legal or survey documents.
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Understand that both units are mostly obsolete and definitions may vary.
Limitations
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Units are based on historical lengths that differ slightly from modern standards.
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Conversion precision depends on the exact feet and metre values from older sources.
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Both units are rarely used in current measurement systems and can cause confusion.
Frequently Asked Questions
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What is a nautical mile (UK)?
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It is a historical UK maritime unit defined as exactly 6,080 feet or 1,853.184 metres, slightly longer than the international nautical mile.
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What is a perch unit used for?
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A perch is an old unit of length equal to 16.5 feet, traditionally used in surveying and land measurement, mostly found in older documents.
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Why convert nautical mile (UK) to perch?
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To interpret and reconcile historical maritime and land measurement records that used these outdated units for accurate comparison.
Key Terminology
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Nautical mile (UK)
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A historical UK maritime length unit defined as exactly 6,080 feet or 1,853.184 metres.
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Perch
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An old length unit equal to 16.5 feet, used mainly in surveying and land measurement.
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Cadastral mapping
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The process of creating maps that show property boundaries and ownership for land records.