NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Latitude and Longitude by "Noon Sun"
From: Henry Halboth
Date: 2005 Jun 7, 09:28 -0400
From: Henry Halboth
Date: 2005 Jun 7, 09:28 -0400
I have just a little difficulty with the terminology "noon sights vs LOP
sights", since the end result of the noon sight is an LOP, albeit a
special case calculation. It is possibly also worthy of note that, as
most newly made "navigators" graphically plot when using the intercept
method, there are inadvertent errors introduced that have not been
discussed on this list. In the days before plotting sheets, which
incorporate certain distortions in printing, LOP intersections were
calculated - even in my day. You just didn't louse up "expensive" charts
by repetitious plotting. Just a little historical aside - not a
criticism! Further, the intercept method was generally not employed in
hydrographical surveying, i.e., in super-accuracte position determination
by astronomical observation.
Henry
On Mon, 6 Jun 2005 22:59:29 EDT Frank Reed writes:
> Lu Abel you wrote:
> "I don't see noon sights vs LOP sights as an either-or proposition
> -- at
> least not for a "good" navigator (which I hope all on this list
> would
> claim they either are or aspire to). "
>
> A good navigator is the guy who pulls a functioning spare GPS
> receiver out
> of a metal box after your vessel has been struck by lightning and
> all the
> other electronics are fried!
>
> -FER
> 42.0N 87.7W, or 41.4N 72.1W.
> www.HistoricalAtlas.com/lunars
>
