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    Re: book on Modified H.O. 211
    From: Joe Shields
    Date: 1999 Sep 01, 8:07 AM

    For 6 bucks it is a steal!  The book is 32 pages, but the actual table will
    fit on very few 8.5 x 11 sheets of paper (xeroxed) so you can have an
    unlimited number of backup copies stuffed inside the sextant case, in a life
    raft, etc.
    
    I have a copy of the original 1940's H.O. 211 with thumbnail indexes, but it
    took me so long to obtain it and it is so old now, that it is sort of
    collector's status for me, and I don't like to get it dirty.... so I have
    gotten used to using Bayless' compact H.O. 211 table.  I think once I got
    accustomed to it, it actually became faster than using the original H.O. 211
    because there are fewer pages to flip through.  You do have to be careful to
    make sure you are using an A col. or B col., but that is automatic for me
    now.
    
    Since purchasing a GPS for $100, I have been re-thinking Celestial Nav. as a
    practical emergency backup.  Celestial is a volatile skill that needs to be
    practiced regularly to be of use.  In the worst scenario (boat sinks -
    you're on a small life raft in the middle of the ocean - no electricity, no
    electronics) do you really want all the weight of H.O. 229 or 249 sloshing
    around?  Yet if that is what you use regularly, will you be able to pick up
    H.O. 211 quickly enough to maybe send a position before the radio goes out?
    I've put together a little booklet containing the H.O. 211 table pages from
    Bayless, and the one page concise Sun almanac table from the instruction
    manual that came with my Davis Mark III sextant.  Just using that booklet
    (it also contains the one page arc-to-time table and the Refraction
    correction tables from a 1993 Nautical Almanac) and the plastic sextant, I
    can consistently get within 10' of what my GPS says.  By interpolating the
    Sun's position instead of just using the daily figures for Declination and
    Eq. of T. I can get even closer.  That is enough of a reassuring check on
    what the GPS is saying, plus provides practice time for worst scenario
    disaster so that my backup method is comfortable.  I can reduce a shot in 5
    minutes, and everything I need is in one case (paper and pencils and back up
    watch with known error rate included).
    
    So for me Bayless is great!
    
    -- Joe
    
    
    
    > ----------
    > From-         Russell Sher[SMTP:rsher{at}TELLUMAT.COM]
    > Reply To:     Navigation Mailing List
    > Sent:         Wednesday, September 01, 1999 3:17 AM
    > To:   NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    > Subject:      book on Modified H.O. 211
    >
    > Hi - does anyone know about the book 'COMPACT SIGHT REDUCTION TABLE:
    > Modified H.O. 211, Ageton's Table'?
    > (by Allan E. Bayless)
    > In particular, I am interested in obtaining opinions by anyone who has
    > used
    > it and recommends obtaining it.
    >
    > Regards
    > Russell
    >
    

       
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