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    Re: Just getting started
    From: Doug Royer
    Date: 2007 Jan 19, 10:51 -0800

    
    
    
    For tables either H.O 249 or H.O. 229 or H.O. 214 are all very similar 
    and 249 is the most convenient but only has a precision of one minute of
    
    arc which is an accuracy on one nautical mile which is realistic on a 
    small boat. If you want higher precision, especially for practice shots 
    while on shore, then 229 or 214 will do.  214 is out of print but I 
    think its arrangements of the tables is more convenient than in 229.
    
    BTW, does anybody know why they switched from the 214 format to the 229 
    format so you cant just do a round of sight using only one page as you 
    could do with 214 but have to chase all over for the LHAs?
    
    My understanding for the change in format from HO-214 to HO-229 was for
    ease/speed of tabular reduction with about the same level of precision.
    That may be correct. HO-229 does eliminate a step or two compared with
    HO-214. But then kind of requires the addition of a step when computing
    the double 2nd difference.
    
    To expand on this further for the new guy's benefit:
    I, personally, like using the old HO-214.
    HO-249 vol. #1 is quick and easy to use but limits a person to using
    only the listed stars. Sometimes those listed stars can't be used
    because of local conditions but other, unlisted, bodies that may be
    useable can't be included for reduction because there is no data listed
    for them.
    HO-249 Vols. #2 and 3 are arranged in the same format as are HO-229 and
    does away with this limitation.
    
    If you want a short tabular method H.O. 208 is my preference.
    
    Good method. My preference is in using HO-211. It consists of 28 pages
    of data in one volume which covers it all from anywhere. Easy to use and
    quick for obtaining passable results with no limitations on which bodies
    may be used. For those minimalists in small vessels there is a 9 page
    volume of the same method. 
    
    You can find many of these books on ebay.
    
    Or one may download a copy of both HO-208 and HO-211:
    
    http://www.geocities.com/sadams16/Navigation1.html
    
    Or the other methods if you desire. I just like having the hardback
    volumes of HO-214 thru HO-249 to use but it may not be practical in a
    small vessel or if money is an issue the above link will give you the
    volumes.
    
    
    
    
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