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    Re: More accurate version of Pub 249 Vol 1 - is it needed?
    From: Gary LaPook
    Date: 2018 Apr 13, 22:42 -0700

    Ho 229 and earlier HO 214 could try for one-tenth of a minute precision because it uses the actual positions of the celestial bodies published in the Nautical Almanac ON THE DAY of the observations. 

    gl

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