Subject: Re: double line bug & nautical miles<br/>
Date: Nov 24, 2001 @ 02:26<br/>
Author: Grant Hutchison (Grant Hutchison &lt;granthutchison@...&gt;)<br/>
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<div id="ygrps-yiv-1685025286"><blockquote><span title="ireply">&gt; west of wlong 124d 05m 00s 00000  presumably nad83<br/>
 </span></blockquote>What latitude? And are we talking west-along-that-parallel or west-from-<br/>
there-along-the-great-circle?<br/>
<br/>
<blockquote><span title="ireply">  &gt; in 1954 they were probably conceited enough to think they were <br/>
 </span></blockquote>splitting the<br/>
<blockquote><span title="ireply">  &gt; atom but in 2001 all these 5 digits are given with real feasibility by<br/>
 </span></blockquote>the best<br/>
<blockquote><span title="ireply">  &gt; gps receivers arent they<br/>
 </span></blockquote>Um. Well... 0.00001 times 1ft (~30cm) is ~3 *microns*, for goodness <br/>
sake. I can&#39;t think of a way to hold anything that *steady* at sea, even <br/>
if the GPS sats were honed in tight enough.<br/>
It would be crazy to come up with a conversion factor like that out of <br/>
the blue. There must&#39;ve been some intermediate stage, some standard that <br/>
was measured out in imperial units, some calculation that was done by a <br/>
hair-splitting jobsworth somewhere.<br/>
<br/>
Grant</div>