NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Using sun compass for calibrating boat compass
From: Bill B
Date: 2014 May 07, 15:12 -0400
From: Bill B
Date: 2014 May 07, 15:12 -0400
Duh. Refraction only raise the object toward the zenith, and therefore should should not affect the azimuth. Yes no? > > When reducing a sight one would traditionally compute the Hc, then the > azimuth from the Hc (although the azimuth can be computed directly > without the Hc). > > This is fine for plotting an LOP, but it raised a concern for me. Is the > azimuth I obtain for the celestial object tied to its Hc, rather than > its observed position with refraction? > > Perhaps the accuracy of a shadow sun compass (as opposed to a William > Burt solar compass )on a light to medium displacement sail craft is such > that it is a moot point? > ---------------------------------------------------------------- > NavList message boards and member settings: www.fer3.com/NavList > Members may optionally receive posts by email. > To cancel email delivery, send a message to NoMail[at]fer3.com > ---------------------------------------------------------------- > > : http://fer3.com/arc/m2.aspx?i=127691 >
