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    Re: Lunar and Solar upper limb observations and cel nav videos
    From: James Whitson
    Date: 2008 Apr 2, 00:17 -0400
    Mr. Burkes-The same method is used. In rough seas, a prism level attached to your sextant is a handy tool, but a luxury. I seem to need other things more. "Swing your arc, then holler mark", was the the adage my mentor, God rest him, drilled into my brain.-Jim W.

    > Date: Tue, 1 Apr 2008 17:18:21 -0700
    > Subject: [NavList 4782] Lunar and Solar upper limb observations and cel nav videos
    > From: m_burkes@msn.com
    > To: NavList@fer3.com
    >
    >
    > Hi folks 2 questions to pose:Most nav texts discuss lower and upper
    > limb obs but the "swinging the arc" diagrams and explanations only
    > pertain to lower limb. I probably am missing something obvious but can
    > you folks describe the upper limb "swinging the arc"procedure, i.e.,
    > point of tangency, etc?
    > In this day and age of computer generated animations I have only been
    > able to find a very limited no.of cel nav videos, namely Mr. Buckley's
    > and a Magic Lamp one and about 40 dollars price. They are very well
    > presented but limited to solar obs( probably lower limb obs!). It
    > would be pretty cool to see lunar distance, interstellar angles,
    > twilight star and planet obs in video presentation. If anyone has info
    > on this it would be greatly appreciated. Thanks much.
    > Mike Burkes
    > m_burkes@msn.com
    > 626-833-1521
    >
    >
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