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    Re: An interesting question
    From: Paul Dolkas
    Date: 2013 Oct 13, 22:37 -0700

    So if Lewis & Clark used a pan of water as an AH, did the early polar & Antarctic explorers do the same thing? I would imagine that the water would quickly freeze, but it would probably work even better then.


    By the way – I found out that Raould Admusen used sextants for his journey, whereas Scott used a theodolite.



    Paul Dolkas

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Frank Reed
    Sent: Sunday, October 13, 2013 11:38 AM
    To: paul@dolkas.net
    Subject: [NavList] Re: An interesting question


    "It may not be perfect but it sounds like we both think the Salt Flats to have appropriate topography for celestial.
    I'm still trying to answer Lu's student's question. Where on earth, aside from bodies of water, is the surface appropriate for celestial."

    Yes, I agree on salt flats. Frozen lakes can work the same way (if the surface is smooth enough --no compression ridges), but we have the same issue of contrast and questionable refraction. We already discussed lakes, so frozen lakes might not qualify as a separate category. :)

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