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Re: Emergency Navigation
From: Gary LaPook
Date: 2012 Jul 14, 23:32 -0700

While you are at it, it doesn't hurt to memorize a table of approximate logarithms.

Log 1 = 0
log 2 =. 3
log 3 = .5
log4 = .6
log 5 = .7
log 6 = .8
log 7 = .85
log 8 = .9
log 9 = .95

it is an easy pattern to remember.

gl

--- On Sat, 7/14/12, Örjan Sandström <pokerbacken@yahoo.com> wrote:

From: Örjan Sandström <pokerbacken@yahoo.com>
Subject: [NavList] Re: Emergency Navigation
To: NavList@fer3.com
Date: Saturday, July 14, 2012, 10:32 PM

how about and abreviated version of star tables from your excellent almanac on an arm and then abbreviated version of your nav table (0-45° in 5' or 10' steps) on the other? the reduction sheet is not really needed but perhaps a version on a leg.
and then a nocturne on the other to be copied to paper when needed? that should take care of longitude to within 2-3° or so at worst.
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