[Boatanchors] Radio transmitter ranges

[George KB2Z]

Wouldn't the whole mile/ knot thing be dependent on the antenna height?

At 04:19 PM 6/16/05 -0400, you wrote:

>Grant,
>
>Let's not confuse things here! If a radio signal is not below the surface 
>of the
>water or on the surface of the land, but above them in the air, should we 
>not be
>discussing aeronautical miles? (Surely somebody somewhere at sometime must 
>have
>come up with air travel conversions. Such as air speed in Knots relative 
>to the
>ground and Knots in terms of actual air speed.) Why even mention how the
>conversion factors change below the surface of the water or above the land 
>mass
>or if the speed is affected by a head or tail wind and ...
>
>When it is all said and done; does it really matter if you drive the car from
>the left or the right hand side, whether the driver is right or left handed or
>ambidextrous or if they even know their right from their left?
>
>Now why did we get a nautical and a statute mile to begin with? What was wrong
>with just a "mile"? Who came up with Knots anyhow, surely not Mark Twain! 
>(LOL!)
>Who had the bright idea of calling a distance traveled beneath the surface of
>the water a 'league' anyhow?
>
>----------
>From: Grant Youngman <nq5t at comcast.net>
>To: boatanchors at mailman.qth.net
>Subject: RE: [Boatanchors] Radio transmitter ranges
>Date: Thursday, June 16, 2005 3:58 PM
>
>
> > Now a nautical mile is 6,076 feet.
>
>Unless you're in the UK, in which case it is still often shown as 6080 feet.
>Or running plotting board solutions, etc., in which case 6000 feet (2000
>yds) is nominally taken as the nautical mile for the purpose of computing
>speed and/or time.  But I believe the international standard is a hair over
>6076 feet.
>
>It's all over the "map" so to speak :-)
>
>Grant/NQ5T
>
>
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