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    Re: Fixes consistantly south and west of GPS
    From: Peter Monta
    Date: 2014 Nov 16, 21:43 -0800
    McMaster-Carr lists a few mounted vials (20 arcsec and 6 arcsec):

    http://www.mcmaster.com/#2160a5/=umn1t8
    http://www.mcmaster.com/#2160a2/=umn1tx

    There's also a replacement vial for the Starrett "199Z Master Precision" level, around 9 arcsec assuming they use the 2mm sensitivity convention:

    http://www.mcmaster.com/#starrett-levels/=umn69f

    Maybe vials extracted from surplus theodolites, striding levels, non-automatic surveying levels, etc. could be used if they can be obtained cheaply.

    Cheers,
    Peter

       
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