Re: [PSUBS-MAILIST] Prone position tips?

[Jon Wallace <jonw@psubs.org>]

Sean appears to be correct as far as I can find out on the web.  Here 
are a couple of other resources.

http://www.google.com/search?hl=en&q=what+is+a+league&aq=f&oq=&aqi=g5
http://answers.yahoo.com/question/index?qid=20061006184934AAGuDex

The google calculator claims that a league is equal to 3.45 miles, where 
answers.google.com says a league is equal to 3 miles or 3 nautical miles 
depending upon who was doing the defining.  However, 1 league = 3 
nautical miles = 3.45 statute miles appears to be correct.  I did also 
find a reference to a "league" being a unit of measure based upon 
walking distance.

There appears to be an assumption by many (myself included until I 
looked all this stuff up to answer Greg) that 20,000 leagues under the 
sea was a reference to depth, when in fact it was a reference to the 
distance (horizontally) traveled by the Nautilus under water.

Jon



Sean T. Stevenson wrote:
> An bit of background on the league:
>
> http://en.wikipedia.org/wiki/League_(unit)
>
> The league is a variable distance of approximately three miles, but 
> historically most often defined as the distance a man can walk in an 
> hour.  The fathom, conversely, is used exclusively for measuring the 
> depth of water.  Examining magnitudes alone, the league is 2640 times 
> larger, however, since the implied vector directions are 
> perpendicular, their cross-product is zero and one cannot be said to 
> be a multiple of the other.
>
> Sean T. "too much free time" Stevenson




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