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    Re: CN Aboard Commercial Flights
    From: Alexandre Eremenko
    Date: 2012 Mar 15, 13:40 -0400

    > I found in the archives one of your posts on bubble octant trials with a
    > MK IXa (NavList 2170).
    > If this bubble octant is radium free then I wouldn't worry about using
    > it
    >on a commercial flight here in the U.S.
    I suppose it is free: it has a battery ilumination.
    (There is a bubble camera with a liquid, of course).
    My main concern was not taking shots from an airplane with a bubble
    sextant (though this is an interesting ides) but transporting my
    ordinary marine sextant when I travel. I used to pack it carefully
    and check in to the luggage. But since my friend had his
    binocular in a checked in siutcase
    disassembled by some security in Germany, I do not do this anymore.
    > Your trial results are pretty good.
    > On land anything better than 4 NM from GPS is good and
    What do you mean "4nm from GPS" ? I never owned a GPS but I suppose it is
    much more accurate than 4 nm.

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