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    Re: Using a slide rule for celnav
    From: Sean C
    Date: 2014 Jan 22, 13:56 -0800

    "This is covered in great detail in appendix Q of the the 1977 edition of Bowditch." -Gary LaPook

    Thanks! I looked this up online and learned a lot. Personally, I think the following quote is one of the most important and useful concepts I have read to date:

    "Lines of position which are are known to be of uncertain accuracy might better be considered as 'bands of position', with a width of twice the possible amount of error. Intersecting bands of position define areas of position. It is most probable that the vessel is near the center of the area, but the navigator must realize that he could be anywhere within the area, and must navigate accordingly." -Pub. 9

    -Sean C.

    I just found this same section in my 2002 ed., in chapter 23 sections 03-06.
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