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    Re: Neat video about LEM stellar alignment scope
    From: Don Seltzer
    Date: 2016 Jun 8, 19:47 -0400

    On Wed, Jun 8, 2016 at 5:08 AM, Gary LaPook <NoReply_LaPook@fer3.com> wrote:
    I wonder what what level of precision they achieved (needed) for this method of measuring angles to celestial objects.

    It doesn't exactly answer the intent of your question, but I did dig up the following:

    A reticle control enables manual rotation of the reticle for use in lunar surface alignments. A counter on the left side of the unit, provides angular readout of the reticle rotation. The counter reads in degrees to within ±0.02" or ±72 seconds. The maximum reading is 359.88 degrees, then the Counter returns to 0 degrees. Interpolation is possible to within ±0.01 degrees. 

    Don Seltzer
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