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    Re: Kollsman periscopic sextant mount Correction
    From: Fergus Kavanagh
    Date: 2016 Jan 27, 08:52 -0800

    Thanks David, You didn't misinform me. The Sextant mount is in a DC-7C, and the mount bears the marking KSH0203, which corresponds with an RAF Mk1 sextant.

    The azimuth ring on the Mk1 sextant appears to be part of the sextant, as per the Service manual for same. Also, the bottom of my sextant mount seems similar to yours albeit a considerably smaller diameter. Perhaps they are easily detached and become separated by accident etc.,

    My example is partially corroded. The interlock Bowden cable is but a memory, and the hardware to dismantle the hatch cover handle locking block is very inaccessible, without removing the complete mount from the fuselage attachment, which someone already tried and failed.

    Also the actual mount differs a little from the patent drawings. I need x-ray vision.

    If I may, I will ask you two further questions, probably stupid ones, as I am not a navigator (ex radio officer, 74-79).

    My Kollsman sextant azimuth scale appears to me to read backwards. What am I missing here?

    Secondly, the index scale seems to read up to 100, rather than the 90 I would expect. ??

    Attached is a photo of the front page of the mk1 service handbook.




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