Next message: Henry C. Halboth: "Re: Latitude and Longitude by "Noon Sun""
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
--
Visit our website
http://www.landandseacollection.com
-------------- Original message from Lu Abel <>: --------------
> 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 will 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
