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    Re: Mark 15 Maintenance Question
    From: UNK
    Date: 2005 Nov 21, 08:38 -0500

    Hi Paul,
    I had good support from Davis - this may be their busy season.  If I  
    understand your question correctly, and if you have the traditional mirror, I 
    think the screw goes through the spring clip and into a nut that is in a 
    formed hole in the plastic.  Look on
    for Repair Kit RO26G which has 8 springs, 3 screws, and 4 nuts for the Mk 15 
    or 25.  It's $4.  There is another kit that also includes the two Mk 15 
    mirrors for about $20.  All of this is for the traditional mirror.  I have no 
    experience with the whole horizon mirror.
    You may also be able to bend the spring clip so it provides more resistance.
    Regards, Noell
    >>> lists@HONYAKU-PLUS.COM 11/21/2005 3:39:49 AM >>>
    I realize that this is not quite on topic, but I sent the following
    message to Davis support and got no response. I've had approximately
    three month's experience with a sextant, so I figure anyone here
    would know more about it than I.  Any suggestions would be
    Hi there.
    The index error adjustment screw on the horizon mirror (the one
    farthest from the frame) seems to be too loose even when properly
    adjusted. The screw is easily jogged out of position, which of
    course allows the mirror to shift. The screw seems to move quite
    freely from side to side unless completely tightened, which of
    course gives high a IE on the arc.
    As a result, I get 10' to 20' of "index error" in a very short
    period of time (like after one reading) when taking sights even
    after having adjusted the mirror. At first I thought it was the
    normal error attributed to heating of the plastic, but it is just
    too much fluctuation too quickly for that to be the case.
    Is this a common problem? Or, better yet, can you suggest a fix for
    Paul Flint
    Kawasaki, Japan
    N35 35' 41" E139 30' 30"

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