BurfordTJustice

2018-10-11 12:09:19 UTC

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PermalinkA nautical mile is a unit of measurement defined as exactly 1,852 metres.

Historically, it was defined as one minute of latitude, which is equivalent

to one sixtieth of a degree of latitude.

From lefty wiki even....

https://en.wikipedia.org/wiki/Nautical_mile

"Clare Snyder" <***@snyder.on.ca> wrote in message news:***@4ax.com...

: On Wed, 10 Oct 2018 23:41:03 -0400, micky <***@bigfoot.com>

: wrote:

:

: >

: >This is from Wikip's article on Gemini 8:

: >

: >Perigee (min): 159.8 kilometers (86.3 nautical miles)

: >

: >Why are there nautical miles but no nautical kilometers?

:

:

: Why shouldthere be? A naughtical mile is equivalent to 1 degree of

: latitude. A statute mile is an arbitrary measurement.

: The origins of the meter go back to at least the 18th century. At that

: time, there were two competing approaches to the definition of a

: standard unit of length. Some suggested defining the meter as the

: length of a pendulum having a half-period of one second; others

: suggested defining the meter as one ten-millionth of the length of the

: earth's meridian along a quadrant (one fourth the circumference of the

: earth). In 1791, soon after the French Revolution, the French Academy

: of Sciences chose the meridian definition over the pendulum definition

: because the force of gravity varies slightly over the surface of the

: earth, affecting the period of the pendulum.

:

: Why add another arbitrary measurement to the mix????