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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Chasing Shackleton
    From: Brad Morris
    Date: 2014 Jan 16, 17:18 -0500

    Whoops!  Right Stan, I've got sextant on the brain.  Boxed chronometer, got it!

    Did your model come with the binocular attachment as well?  

    On Jan 16, 2014 5:02 PM, "Stan K" <slk1000@aol.com> wrote:

    Brad,

    Mine has an odd set of scopes:
    1) 3x30 non-inverting star scope (actually very nice)
    2) 6x19 inverting, with a tic-tac-toe board set of four "crosshairs"
    3) 12x19 inverting, with a pair of parallel "crosshairs"
    4) zero magnification sight tube

    I can't imagine what 2 and 3 are used for.  Calibration perhaps?

    By "boxed sextant" I assume you meant "boxed chronometer".  On the program there is the pocket chronometer swinging in the breeze rather than being inside a shirt that was previously mentioned.

    Stan


    -----Original Message-----
    From: Brad Morris <bradley.r.morris---.com>
    To: slk1000 <slk1000---.com>
    Sent: Thu, Jan 16, 2014 4:17 pm
    Subject: [NavList] Re: Chasing Shackleton


    Stan
    You've got to love the star scope that comes with it.  Enormous optics.  And nearly all of the scopes (not the star scope tho) come with internal cross hairs.
    Note that Worsley's chronometer is in that flickr  photo too.  Not the boxed sextant as shown in the Chasing Shackleton program.
    Brad
    On Jan 16, 2014 3:42 PM, "Stan K" <slk1000---.com> wrote:

    Brad,

    In one view I thought I saw the side-to-side clamping mechanism, with "buttons", that my Hezzanith has.  That, and the three ring frame (which other brands use, though) still leads me to believe it was a more current micrometer drum Heath sextant.

    Looking a a photo of Worsley's sextant at http://www.flickr.com/photos/markbrandon/7220573974/, though not at the best angle, it appears to be essentially identical to mine, which is of the right vintage.  Mine is in great condition, with all parts.  Frank got to try it last summer.

    Stan


    -----Original Message-----
    From: Brad Morris <bradley.r.morris---.com>
    To: slk1000 <slk1000---.com>
    Sent: Thu, Jan 16, 2014 2:42 pm
    Subject: [NavList] Re: Chasing Shackleton


    Hi Stan
    They may be using the hezzanith mechanism, but as to the comparison between it and the one Worsley used, there is none. 
    That sextant had top of the line features, some patented.  Some hard to use, like the binoculars that attach to the frame, for that whole horizon view.  The sextant in the show appears quite ordinary.
    The hezzanith feature refers to the endless tangent screw with automatic clamp.  In other words, you could move the index arm about freely with the screw unclamped and then finely adjust with the screw clamped.  This is just one of the patented features.
    Brad

    On Jan 16, 2014 2:18 PM, "Stan K" <slk1000---.com> wrote:

    I'm watching Part 2 right now.  This time they got the photograph of Worsley going the right way.  I take note that they are "cheating".  The sextant they are using does appear to be a Hezzanith, but it is a micrometer drum type, not a vernier type.

    FWIW, I have a 1905 Hezzanith vernier sextant, and I cannot figure out what continent I am on with it.  Micrometer drums sure are easier.

    Stan

    : http://fer3.com/arc/m2.aspx?i=126447

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID 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