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Re: Emergency Navigation
From: Gary LaPook
Date: 2012 Jul 15, 13:44 -0700

Just memorize the refraction table to a precision on one minute and above 10 degrees.

5' above 10 degrees
4 above 12
3 above 16
2 above 21
1 above 33 and
0 above 63

from the air almanac

gl

--- On Sun, 7/15/12, eremenko@math.purdue.edu <eremenko@math.purdue.edu> wrote:

From: eremenko@math.purdue.edu <eremenko@math.purdue.edu>
Subject: [NavList] Re: Emergency Navigation
To: NavList@fer3.com
Date: Sunday, July 15, 2012, 10:57 AM

Thanks.
One can wear it with a Bris sextant as a pendant on the neck:-)
Now we can discuss what to print on it:-)
First of all, Sun declination, equation of time
(or a beautiful anlemma instead), and refraction table.
Coordinates of the principal stars...

What else?
Lunar distance table for 2 years in the format of an XVIII century
almanac may fit conveniently...

Alex.

>>Why not to make T-shirts with emergency almanac data printed on them?

> Brilliant!

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