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    Re: The Moon and bubble sextant
    From: Bruce Hamilton
    Date: 2008 Nov 09, 19:59 -0800

    That was with the A10. The Mark IX is still lacking a  bubble, and I
    need to get in to work to use the shop to fill it.  BTW I assume there
    was a LOT of luck with those 2 moon sites. I am lucky to get a 10  mile
    error with stars. My average is 5 to seven miles.
    
    jean-philippe planas wrote:
    > Was that with your new MkIX or with the A10?
    > JPP
    >
    >
    >
    > --- On *Sun, 11/9/08, bruce hamilton //* wrote:
    >
    >     From: bruce hamilton 
    >     Subject: [NavList 6475] Re: The Moon and bubble sextant
    >     To: NavList@fer3.com
    >     Date: Sunday, November 9, 2008, 1:17 PM
    >
    >     Thanks Mike that worked well, and I tried another method that I would
    >     like to know if anyone else has had luck with. I put the lower limb in
    >     the center of the bubble. (My AP is my actual position on earth.)First
    >     result the LOP .3 NM from AP second try was 1.1 NM from AP.  My luck
    >     factor was very high last night! I wish I had taken the a-12 out too.
    >
    >     Mike Burkes wrote:
    >     > Hi Bruce, Air
    >      Almanac not necessary for Moon corrections. Refer to
    >     > Nautical Almanac page xxxiv after the "Increments and
    >     Corrections"
    >     > Table and I quote:" For bubble sextant observations ignore dip, take
    >     > the mean of upper and lower limb corrections and subtract 15' from the
    >
    >     > altitude." Hope this helps, have fun I know I do! I also have an A-10
    >
    >     > and my only complaint is lack of total sun filtering,i.e. the
    >     > potential for eye damage is possible so be careful.
    >     > Mike Burkes
    >     > 626-833-1521
    >     >
    >     > > Date: Sat, 8 Nov 2008 22:30:46 -0800
    >     > > From: bruce.hamilton@shaw.ca
    >     > > To: NavList@fer3.com
    >     > > Subject: [NavList 6465] The Moon and bubble sextant
    >     > >
    >     > >
    >     > > I have never shot the moon with my bubble sextants and it is the only
    >     > > body that is peeking out from the gloom tonight. It is quite handy
    >     > > actually
    >      as it peers through quite a lot of cloud and a light filter
    >     > > sharpens it up nicely. As I am sure all of you understand, I have to
    >     > > make sure that my balcony has not changed location on the face of the
    >     > > earth. I do not own an Air Almanac yet, and I was wondering if it
    >     > > contained correction tables for the moon and sun that were made for a
    >     > > bubble sextant. With the sun, I just use the star corrections, or
    >     > > average the upper and lower limb.
    >     > >
    >     > > I just got a Mark IX on e-bay for 31 dollars. It is missing the cover
    >     > > for the averaging clockwork system, and I will have to fill the
    >     bubble
    >     > > system, but it is otherwise fine. I found a reference to a page on
    >     this
    >     > > list that gives me all the details I need to remove and fill the
    >     bubble
    >     > > mechanism.
    >     > >
    >     > > I now own an A-12, and A-10, and the Mark IX.
    >      Can I stop collecting
    >     now?
    >     > >
    >     > > Bruce Hamilton
    >     > > Vancouver, BC
    >     > > CN89kg
    >     > >
    >     > >
    >     > >
    >
    >
    >
    >
    >
    >     >
    >
    >
    >
    >
    >
    
    
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