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    From: Greg B
    Date: 2014 Dec 17, 12:24 -0500

    Hi All,
          A couple of quick (?) questions raised by the the recent discussions
    about the compact Haversine table and the Brown-Nassau Spherical
    computer. I sail a Catalina 28 MK2 ( mid 1990's) so I am used to bobbing
    about when underway. I must say up front that all of my celestial sights
    are for fun - as I basically sail in Long Island Sound. Still it is a
    skill worth
    knowing to me. On land I can get a sight down to 0.1 or 0.2 NM I have
    heard others say +/- 5NM would be good on the water - but on what size
    vessel? Also if I take multiple sights, only at say, at the crest of a
    wave -
    - do I figure wave height into my eye height error? Seems like the math
    really doesn't have to be any more accurate than the error inherent in the
    sight.(?). I must also say up front that I love period navigation but my
    Cat 28 + my skill level ='s no ocean going boat. So doing it on the sound is
    going to have to do. But I have used my sextant for determining range
    with good results (+/- 0.1 NM) while doing coastal i.e; DR +Pilotage, and
    since I'm also a history buff (Huntington Militia) - I made a lead line
    and log
    line - good fun!
    Many thanks in advance,
    ~ Greg
         Svenska Flicka
         Cat. 28 MK2

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