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  Also, look at these prior posts:


http://www.fer3.com/arc/m2.aspx?i=104304&y=200712

http://www.fer3.com/arc/m2.aspx?i=104310&y=200712

Also remember (very important) do not apply a semi-diameter correction
when using  a bubble sextant since you are measuring to the center of
the sun or of the moon. If using the Navy website to do the computation
back out the S.D. correction and use only the refraction correction 9you
can ignore the parallax correction.)

gl



On 9/10/2010 6:41 AM, Dave Harwood wrote:
>
> Frank, I'll use this moment as my opportunity to step out of the
> shadows and become a NavList contributor. First, some personal info:
> I'm active duty Air Force currently stationed in Okinawa. Several
> years ago I took an interest in Cel Nav after reading South by Sir
> Ernest Shackleton. After reading a few books on the subject, countless
> Google searches and a lot of time spent at the beach, I've taught
> myself to consistently plot a fix within 4-5 miles of my known
> position with a Davis Mark 15. I've recently completed the ASA 101 and
> 103 (104 scheduled for Oct) sailing courses and have put some of my
> skills to use. Up to this point I've simply been an observer of
> NavList. Not because I intend to simply plunder its resources without
> giving something in return, but because I didn't believe I could
> contribute much to the conversation at my level. I've come a long way
> and I'm ready to jump in!
> Enough about me already, I'll get to the point:
> My interest has now taken me into the realm of air navigation. I
> purchased an A-10A online and, not so surprisingly, found it to be
> seized. With the help of Bill Morris's manual I've successfully
> restored this unit and I would like to learn more about its use. I do
> not intend to hijack this thread, however, in their absence I'll keep
> it going.
> Could someone detail its proper use and the process involved in an
> airborne fix? I have a copy of the Air Almanac (although a 2011) and
> plenty of opportunities to use it while airborne.
> Also, how should I go about establishing its accuracy (e.g. index error)?
> Thanks for any help that can be offered,
> Dave Harwood
>
>
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