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    Re: Sumner's Line (Navigation question)
    From: Ken Gebhart
    Date: 2006 Feb 8, 22:11 -0600

    On 2/7/06 4:27 PM, "Bill"  wrote:
    > Frank wrote:
    >> Bill wrote:
    >> "An ID 10-T  question."
    >> First, thank you for making me look this up. To save anyone  else the effort,
    >> if you write out ID-10-T, and drop the dashes... and make the  "1" look more
    >> like an "I", you get IDIOT.
    > Sorry about that. It is in such common use as an error description by
    > programmers and alpha geeks in the the Purdue area, I thought it was
    > universally known.  Another common acronym in the software industry,
    > especially with support folks, is "DSO Error."  DSO being "dumb sh-t
    > operator."
    > Thank you for the excellent description of the process.  As other list
    > members have mused, I too find it rather amazing that it was almost a
    > century after the on-board chronometer was invented that Sumner stumbled on
    > and published the concept of the celestial LOP.  One would think that since
    > it was in most cases a running fix, and latitude was often determined by DR,
    > that someone would have done a couple of "what ifs" with different latitudes
    > long before and noticed the relationship.  A great case of mind set blinding
    > one to options.  My feeling has always been that creativity is a momentary
    > cessation of stupidity.
    > Bill
    I think you are exactly right.  Arthur Koestler's book "The Sleepwalkers"
    (30 years old) explores humanity's blindness to the obvious throughout
    history.  After reading it, I have never said "why didn't they think of that

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