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One problem that I encountered is that the whole index mirror looks so narrow
under a large angle, that it is hard to hold the Sun limb within it.
(The whole Sun just does not fit).

Alex.

________________________________________
From: NavList@fer3.com [NavList@fer3.com] on behalf of Stan K [NoReply_StanK@fer3.com]
Sent: Friday, September 18, 2015 3:47 PM
To: eremenko@math.purdue.edu
Subject: [NavList] Re: Sextant arc length

Alex,


Yes, they may be difficult to do (I even had trouble at 128�) but apparently 
the Navy Mark II could go to 145�, making it a quintant.  So the Bowditch 
problem might be an arbitrary example, but not out of the realm of 
possibility.


Stan



-----Original Message-----
From: Alexandre Eremenko 
To: slk1000 
Sent: Fri, Sep 18, 2015 1:12 pm
Subject: [NavList] Re: Sextant arc length




I tried some very long Lunars (up to 137d) with my SNO-T and
backsights with a pocket sextant (up to 140d). This is very tricky.

I suppose the example in Bowditch is given for illustration only.

Alex.
________________________________________
From: NavList@fer3.com [NavList@fer3.com] on behalf of Stan K [NoReply_StanK@fer3.com]
Sent: Friday, September 18, 2015 11:12 AM
To: eremenko---.edu
Subject: [NavList] Re: Sextant arc length

Thanks, Dave.  No need to remove the stop screw - I was just trying to figure 
out whether a problem in the 1977 Bowditch of a back sight with a sextant 
altitude of 141d 04.9' was realistic or just some arbitrary example.


Stan









:
http://fer3.com/arc/m2.aspx/Sextant-arc-length-StanK-sep-2015-g32827

   

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