Loran C off the air
Philip Miller Tate
Philmt59 at aol.com
Thu Aug 12 18:57:27 CDT 2010
> Polaris isn't due north, but as much as 44 arcminutes east or west,
> depending on the time of day.
>> No big deal - I can't walk straight anyway. Folks survived before
Loran or GPS, and I guess they will after them, too.
>> I used to be able to tell the time by observing Polaris and the
pointers to within fifteen minutes accuracy at any time of year. I
forget the trick now, but it's fairly easy with a little mental
arithmetic. Doh! That's today's kids sunk, then.
> There's not a good analogue in the southern hemisphere; the
> Southern Cross constellation, Crux, is 30 degrees away from the
> pole, though it "points" toward the pole. See http://
> for a quick summary and how you can use Crux to estimate the
> southern pole location in the sky.
>> I've never been south of the equator, but I believe that there
are very few bright stars or constellations visible down under. On
the other hand, the Magellanic clouds probably make up for it a bit.
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