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    Re: Latitude and Longitude by "Noon Sun"
    From: Joel Jacobs
    Date: 2005 Jun 6, 12:54 +0000
    Lu,
     
    I applaud your reasoning. There is a lot to be learned from your simple statements. It smacks of being an experienced offshore Naviguesser. I think you were describing that selecting bodies abeam is that the resultant LOP gives you a good basis for determening set and drift.
     
    Joel Jacobs
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    -------------- Original message from Lu Abel <lunav{at}ABELHOME.NET>: --------------


    > Charles Seitz wrote:
    >
    > > May I suggest a noon sight fix might suffice for verification
    > > of the dead reckoning position required for a direction/intercept
    > > fix? Might that fix actually be superior to a DR position that
    > > hasn't been updated during a period of prolonged cloud cover?
    >
    > If I were running an "aged" DR, I think an LOP perpendicular to the DR
    > track would be the most useful way of getting a better estimated
    > position. So a noon sight would be most useful on a north-south course.
    > If I were running more E-W, I'd personally prefer a LOP sight from a
    > body (sun? moon?) directly ahead or astern. In fact, this latter can
    > be generalized to any direction -- the best EP w! ill likely be given by
    > an LOP perpendicular to the course and therefore from a body ahead or
    > astern.
    >
    > Before the really smart people on this list jump on me -- I'll amend the
    > opening statement to wishing for an LOP perpendicular to my expected
    > direction of motion (ie, if I thought I might be being set by a current
    > I'd wish for an LOP that was perpendicular to the expected COG). Even
    > more important, I might wish for a sight that gave me a LOP between me
    > and a dangerous area (shoals, coral atoll, ...) so I'd know how close to
    > it I was.
    >
    > Lu Abel
       
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