NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Precomp Navigation
From: Hewitt Schlereth
Date: 2012 Dec 17, 11:34 -0800
From: Hewitt Schlereth
Date: 2012 Dec 17, 11:34 -0800
Hi again. This time with a not-really-urgent-at-all request. I use a rule mainly for trig. It would be a nice touch if the main full-degree marks also had the complements of the angles ala K&E. Doesn't have to be colors, maybe italics for the cosines. You've got a great product. The other thing I like is it's so easy to look up logs. Hewitt Sent from my iPad On Dec 17, 2012, at 9:39 AM, "Hewitt Schlereth"wrote: > Hey, great going. Looks like with Weems' sec/csc tables in The Secant Time Sight book (Public Domain, according to Google Books site) and the formulas in the lower right of figure 1 you have what you need to compute an LOP. > > Also looks like the formulas should be easy to restate into cos/sin for slide rules. Will check this out later. > > Hewitt > > Sent from my iPad > > On Dec 17, 2012, at 12:40 AM, "Gary LaPook" wrote: > >> >> See attached. >> >> gl >> --- On Sun, 12/16/12, John Brown wrote: >> >> From: John Brown >> Subject: [NavList] Re: Precomp Navigation >> To: NavList---org >> Date: Sunday, December 16, 2012, 2:52 PM >> >> From Richard Langley:Table of contents: >> http://www.ion.org/publications/toc/celnavTOC.pdf >> Apparently still available for $50. (towards the bottom): >> http://www.ion.org/shopping/begin.cfmHello RichardOnly 18 cents per paper! Makes the $13.50 just for Precomp look somewhat expensive.I don't remember where I got my copy from - perhaps through the RIN, and I'm sure it wasn't $50 at the time.John >> ---------------------------------------------------------------- >> 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 >> ---------------------------------------------------------------- >> >> >> Attached File: http://fer3.com/arc/img/121454.precomp_0001.jpg >> >> Attached File: http://fer3.com/arc/img/121454.precomp_0002.jpg >> >> Attached File: http://fer3.com/arc/img/121454.precomp_0003.jpg >> >> Attached File: http://fer3.com/arc/img/121454.precomp_0004.jpg >> >> >> : http://fer3.com/arc/m2.aspx?i=121454 >> >> > > > > > : http://fer3.com/arc/m2.aspx?i=121458 > >