Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: the answer...?
    From: Russell Sher
    Date: 1998 Sep 29, 04:37 EDT

    You can keep the armour off for my answer Joe, perhaps just move up to give
    me a place to duck behing your shield !....
    I can identify with your comment - perhaps our more experienced navigators
    would not agree, but yes, I have found that it is often subjective - even
    standing in the garden trying to shoot a LAN sight onto the garden wall
    (just for "finding highest-altitude" practice) can be difficult and this was
    in an ideal environment.
    regards
    Russell
    > -----Original Message-----
    > From:	Jim Manzari [SMTP:manzari{at}XXX.XXX]
    > Sent:	Monday, September 28, 1998 8:13 PM
    > To:	navigation{at}XXX.XXX
    > Cc:	Russell Sher
    > Subject:	Re: [Nml] the answer...?
    >
            Jim wrote...
    > ...I consider myself to be a reasonably experienced (celestial)
    > navigator, but I am puzzled by the problem.  The only explanation that
    > I can think of, is that you were on a heading directly opposite to the
    > sun (I confess that I am not familiar with the geography of the area
    > between Mauretania and the Schedlt) and thus the sun appeared to be
    > decreasing in height but still approaching your meridian.
    >
    > And now, I have to add a bit of my own opinion regarding the noon sun
    > shot.    Before I commence, put on your armour,   get your daggers
    > ready for I am about to utter a bit of heresy.
    >
    > The noon sun shot is overrated.    It's beauty lies in the simplicity
    > of the calculations required to obtain one's latitude, but that is
    > where it ends.    One can easily take a few quick observations at
    > "around" noon hour, reduce the sight as normal and plot the resultant
    > east-west LOP on your chart to obtain your latitude.    This method is
    > particularly useful at high latitudes where the trajectory of the sun's
    > passage tends to be fairly flat and determining the exact moment at
    > which the sun reaches its maximum height can be somewhat subjective.
    >  In the winter time here in Iqaluit, I have sat outside, freezing my
    > tail off, for up to 45 minutes, waiting for the sun to reach its
    > maximum height of 3 degrees above the horizon.
    >
    > Even in the mid-latitudes, I have seen people up on deck taking
    > observation after observation, trying to determine the exact moment of
    > meridian passage, and even after all of that, there is no guarantee of
    > a satisfactory result; I have rarely seen two people obtain the same
    > numbers.    I am not suggesting  that the noon sun shot should be
    > discarded - I still like to perform the operation - but it is not the
    > be all and end all.
    >
    > Ok, allow me to put on my bullet-proof suit....fire away folks!
    >
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=
    =-=  TO UNSUBSCRIBE, send this message to majordomo{at}XXX.XXX:     =-=
    =-=      unsubscribe navigation                                         =-=
    =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site