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    Re: 3-Star Fix - "Canned Survival Problem"
    From: Gary LaPook
    Date: 2012 Mar 13, 02:32 -0700
    I made one change in my procedure and you might like to do the same. Instead of memorizing the GHA of Aries for 0000Z on January 1st I memorize it  for December 31st of the prior year. This way the number of days that you have to multiply the daily change in the GHA of Aries is simply the number of the day in the year while if using January 1st you must subtract "1" from the number of days in the year. For example, January 31st is the 31st day of the year yet only 30 days have elapsed since January 1st but it is 31 days since December 31st.


    --- On Mon, 3/12/12, Sean C <yhshuh@aol.com> wrote:

    From: Sean C <yhshuh@aol.com>
    Subject: [NavList] Re: 3-Star Fix - "Canned Survival Problem"
    To: NavList@fer3.com
    Date: Monday, March 12, 2012, 9:38 PM

    After reading about Gary J. LaPook's memory feat I had an idea: On the reverse of the COT scale of my Bygrave Slide Rule I printed the dip and altitude corrections (for stars), temp. & pressure corrections, the SHAs & Dec. of all 57 nav stars for 1 Jul., the GHA of Aries for 1 Jan. plus the daily/hourly increase & finally, the Bygrave instructions.

    Now I have a complete emergency almanac for the stars and sight reduction system on 1 & 1/4 pages. (I cut the COS scale down to 1/4 page to make it easy to slide around.)

    ------------------------Original Message------------------------------

    On 14 Jun 2008, Gary J. LaPook wrote:
    "Being the conscientious navigator that I am, I followed my usual practice of memorizing some data from the 2008 Nautical Almanac so that I would have it available for emergency use.[...]I also memorized the SHAs and the Declinations of ten of the navigation stars ( nobody could memorize all 57) which should be enough for emergency use as tabulated for July 1st so that the values will be reasonable for the whole year."

    I'm assuming you chose the stars based on a good distribution in the sky and also on magnitude. So which stars did you settle on? (And did you choose only for the northern or southern hemispheres or both?)
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