What Is This Tool?
This tool converts length values from inch (US survey), a historical surveying unit, to famn, a traditional maritime unit used primarily for measuring depths and nautical distances.
How to Use This Tool?
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Enter the measurement value in inch (US survey).
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Select "inch (US survey)" as the input unit and "famn" as the output unit.
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Click the convert button to get the equivalent length in famn.
Key Features
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Supports conversion between inch (US survey) and famn.
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Uses exact legacy unit definitions for precise historical data interpretation.
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Ideal for geodetic surveying, maritime navigation, and cartography.
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Browser-based and easy to use without installation.
Examples
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10 Inch (US survey) equals 0.142590106 famn.
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50 Inch (US survey) equals 0.71295053 famn.
Common Use Cases
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Interpreting and converting historical US survey and cadastral records.
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Translating land survey data into maritime-length units for nautical charts.
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Processing legacy geodetic and naval survey datasets with mixed units.
Tips & Best Practices
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Verify unit consistency when mixing legacy and modern measurements.
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Use this conversion mainly for historical and maritime research purposes.
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Cross-check results when integrating with international units or modern datasets.
Limitations
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The US survey inch is a legacy unit superseded by modern feet and metric standards.
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Famn is less commonly used than fathom and may yield discrepancies with alternative definitions.
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Small differences from modern unit standards can affect calculations requiring high precision.
Frequently Asked Questions
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What is an inch (US survey)?
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It is a historical length unit equal to 1/12 of the US survey foot, defined as exactly 100/3937 metres.
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What does famn measure?
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Famn is a traditional maritime length unit equivalent to one fathom or about 1.8288 metres, commonly used for water depth or nautical distances.
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Why convert inch (US survey) to famn?
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This conversion helps interpret legacy terrestrial survey data in maritime contexts such as nautical charting or historical maritime research.
Key Terminology
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Inch (US survey)
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A legacy surveying unit equal to one twelfth of the US survey foot, defined precisely in meters.
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Famn
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A traditional maritime length unit equivalent to one fathom, generally used to measure depth or nautical distances.
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Geodetic Surveying
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The science of measuring positions and distances on Earth for mapping and navigation purposes.