Don Casey - Dragged Aboard Storm Tactics Handbook:
Modern Methods of Heaving-To for Survival in Extreme Conditions
by Lin Pardey and Larry Pardey


      

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Re: Anomalous dip. was: [NAV-L] Testing pocket sextant.

From: Bill (no email)
Date: Fri Jun 16 2006 - 14:57:13 EDT

  • Next message: George Huxtable: "Re: Advancing a position circle. was : [NAV-L] Position from crossing two circles"

    Alex wrote:
    >> Sorry, I missed the fine print on upper- and lower-limb observation, as
    >> well as exactly what standard you were using to determine a negative result.
    >> (I still don't have an answer.)
    Bill replied:
    > I don't understand. What do you mean by a "standard"?

    Alex

    My question was, what are the negative numbers relative to? Does it mean
    that your Ho's are smaller than your Hc's, (Ho < than Hc, plot away from
    body). Or if subtracting Ho FROM Hc, that the Ho's are larger than the
    Hc's?

    Example:

    30d (Ho) - 29d (Hc) = +1d
    29d (Hc) - 30d (Ho) = -1d

    So without some reference or "standard," it was difficult for me to
    determine fit the observed angles were smaller or larger than the calculated
    angle.

    Sorry for the confusion,

    Bill


  • Next message: George Huxtable: "Re: Advancing a position circle. was : [NAV-L] Position from crossing two circles"



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