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    Re: US Navy MK 5 Aboard Small Craft
    From: Michael Dorl
    Date: 2011 Oct 12, 11:46 -0500

    On 10/12/2011 11:12 AM, Greg Rudzinski wrote:
    > When using the US Navy MK 5 it is necessary to wind the averager fully
    > so that the internal view blocking shade retracts from the field of
    > view. This needs to be done whether in bubble mode or natural horizon
    > mode. Does anyone know why this view blocking feature is needed ?
    Maybe so the operator knows to stop tracking the target.  The counter
    value must be combined with the drum reading.  If tracking continued
    might there be some ambiguity?
    Mine makes enough noise to wake the dead but I suppose if you are in a
    B17, B24, or B29, you might not notice the noise from the sextant.

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