What is a fathom (US survey)?

It is a non-SI length unit equal to exactly 6 US survey feet, commonly used in nautical depth measurements.

What does Earth's polar radius represent?

It is the distance from Earth's center to the mean geographic pole along the rotation axis, used as the semi-minor axis in geodetic reference ellipsoids.

Why convert fathoms to Earth's polar radius?

To relate maritime depth measurements to global geodetic scales and integrate nautical data with Earth science models.

Convert Fathom (US survey) to Earth's Polar Radius Online

Use our easy-to-use online tool to convert length units from fathom (US survey) to Earth's polar radius for hydrographic, geodetic, and mapping applications.

Fathom (US survey) [fath]

Earth's polar radius

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

Fathom (US survey) [fath] to Earth's polar radius Conversion Table

Fathom (US survey) [fath]	Earth's polar radius

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 Earth's polar radius Conversion Table
Fathom (US survey) [fath]	Earth's polar radius

Explore More Length Units Converter

What Is This Tool?

This unit converter enables the transformation of lengths measured in fathoms (US survey) into Earth's polar radius values. It is designed for users working with nautical depths and global geodetic parameters, bridging maritime measurements with large-scale Earth models.

How to Use This Tool?

Enter the length value in fathoms (US survey) you wish to convert
Select fathom (US survey) as the input unit and Earth's polar radius as the output unit
Click the convert button to obtain the equivalent measurement in Earth's polar radius
Use the results to relate maritime lengths to global geodetic scales

Key Features

Converts fathom (US survey) units to Earth's polar radius measurements
Based on a specific and exact conversion rate for accurate transformation
Supports integration of maritime depth data with geodetic and GPS mapping
Browser-based and user-friendly interface for quick conversions

Examples

10 fathoms (US survey) equal approximately 2.8769353677301e-6 Earth's polar radius
1000 fathoms (US survey) convert to about 2.8769353677301e-4 Earth's polar radius

Common Use Cases

Recording water depths and nautical soundings in legacy hydrographic surveys
Translating lengths of anchor cables or mooring lines into geodetic terms
Reconciling historical US survey data with modern geodetic reference systems
Supporting satellite orbit modelling and Earth shape studies

Tips & Best Practices

Always verify the reference ellipsoid model (e.g., WGS84) when using Earth's polar radius data
Be mindful of slight differences between US survey fathom and the international fathom
Use this converter to integrate maritime data into global geophysical models effectively

Limitations

The fathom (US survey) slightly differs from the international fathom, affecting precision
Earth's polar radius is based on a geodetic model and may vary with different ellipsoids
Conversion precision may be limited for very high accuracy geodetic applications

Frequently Asked Questions

What is a fathom (US survey)?: It is a non-SI length unit equal to exactly 6 US survey feet, commonly used in nautical depth measurements.
What does Earth's polar radius represent?: It is the distance from Earth's center to the mean geographic pole along the rotation axis, used as the semi-minor axis in geodetic reference ellipsoids.
Why convert fathoms to Earth's polar radius?: To relate maritime depth measurements to global geodetic scales and integrate nautical data with Earth science models.

Key Terminology

Fathom (US survey): A non-SI length unit equal to 6 US survey feet, used in nautical depth measurements.
Earth's Polar Radius: The distance from Earth's center to the mean geographic pole along the rotation axis, representing the semi-minor axis of a geodetic ellipsoid.
WGS84: A widely used geodetic reference ellipsoid model defining Earth's shape and size parameters.

Quick Knowledge Check

What is the US survey fathom used for?

Measuring atmospheric pressure

Recording water depths and nautical measurements

Calculating satellite orbits

Earth's polar radius corresponds to which part of the Earth?

Distance from center to equator

Distance from center to geographic pole along rotation axis

Distance around Earth's equator

Why might precision be limited when converting fathoms to Earth's polar radius?

Because fathoms are not used in length measurement

Due to differences between US survey fathom and international fathom and ellipsoid variations

Because Earth's radius changes daily

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