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deg2nm

Convert spherical distance from degrees to nautical miles

Syntax

```nm = deg2nm(deg) nm = deg2nm(deg,radius) nm = deg2nm(deg,sphere) ```

Description

`nm = deg2nm(deg)` converts distances from degrees to nautical miles, as measured along a great circle on a sphere with a radius of 6371 km, the mean radius of the Earth.

`nm = deg2nm(deg,radius)` converts distances from degrees to nautical miles, as measured along a great circle on a sphere having the specified radius. `radius` must be in units of nautical miles.

`nm = deg2nm(deg,sphere)` converts distances from degrees to nautical miles, as measured along a great circle on a sphere approximating an object in the Solar System. `sphere` may be one of the following values: `'sun'`, `'moon'`, `'mercury'`, `'venus'`, `'earth'`, `'mars'`, `'jupiter'`, `'saturn'`, `'uranus'`, `'neptune'`, or `'pluto'`, and is case-insensitive.

Examples

A degree of arc length is about 60 nautical miles:

```deg2nm(1) ans = 60.0405```

This is not true on Mercury, of course:

```deg2nm(1,'mercury') ans = 22.9852```