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    Re: What is this?
    From: Robert Gainer
    Date: 2006 May 21, 15:42 -0400

    Because it pivots into position how do you have a repeatable reference to 
    level? Each time you place it into position it might be different and that?s 
    not the same as a bubble in the sight tube, which has a repeatable position, 
    and the tube will be level even if the frame of the instrument is tilted a 
    bit. So with a sight tube won?t you have the same measurement while with this 
    arrangement you are measuring towards a reference more then 12? from the 
    eyepiece? I am not sure I am describing this in a way that makes sense but 
    it?s the best I can do.
    Robert Gainer
    
    >
    > From: "Gary J. LaPook" 
    > Date: 2006/05/21 Sun PM 03:07:25 EDT
    > To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
    > Subject: Re: What is this?
    >
    > It does look like a bubble attachment to me and the knob on the left
    > looks like an adjustment knob for the bubble size.
    >
    > gl
    >
    > Greg R. wrote:
    >
    > > Alex wrote:
    > >
    > > > What is this?
    > > > It does not look like a bubble horizon to me.
    > >
    > > And interestingly enough, the Kelvin-Hughes website doesn't seem to
    > > have any info on their sextants:
    > >
    > > http://www.kelvinhughes.co.uk/evf.html?cat=0&keys=sextant
    > > 
    > >
    > > Found Links: 0, Search Category: "Entire Site"
    > >
    > > --
    > > GregR
    > >
    > >
    > > ----- Original Message -----
    > > From: "Alexandre E Eremenko"  > >
    > > To:  > >
    > > Sent: Sunday, May 21, 2006 4:53 AM
    > > Subject: What is this?
    > >
    > > > I hope Nav-L is still alive though it lives its last days:-(
    > > >
    > > > This e-bay listing
    > > >
    > > 
    http://cgi.ebay.com/Kelvin-Hughes-Sextant-1956_W0QQitemZ7416573557QQcategoryZ66638QQrdZ1QQcmdZViewItem
    > > > shows a sextant with a strange attachment in front of its
    > > > horizon mirror. The top right picture shows it attached,
    > > > and the bottom left picture shows the attachment itself
    > > > (on the right). What is this?
    > > > It does not look like a bubble horizon to me.
    > > >
    > > > Alex
    > >
    > >------------------------------------------------------------------------
    > >
    > >No virus found in this incoming message.
    > >Checked by AVG Free Edition.
    > >Version: 7.1.392 / Virus Database: 268.5.6/340 - Release Date: 5/15/2006
    > >
    > >
    >
    >
    
    
    

       
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