GNU Scientific Library – Reference Manual: Speed and Nautical Units

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### 44.6 Speed and Nautical Units

`GSL_CONST_MKSA_KILOMETERS_PER_HOUR`

  The speed of 1 kilometer per hour.

`GSL_CONST_MKSA_MILES_PER_HOUR`

  The speed of 1 mile per hour.

`GSL_CONST_MKSA_NAUTICAL_MILE`

  The length of 1 nautical mile.

`GSL_CONST_MKSA_FATHOM`

  The length of 1 fathom.

`GSL_CONST_MKSA_KNOT`

  The speed of 1 knot.