Find a copy of Hewett Schlerreth's book Commonsense Celestial. I taught myself from that and it's excellent. Basically what you're doing with celestial is figuring out where the heavenly body is directly overhead a point on the earth and then you are calculating the bearing and distance to that point. Tables in the Nautical Almanac and HO 249 make it a simple matter of adding and subtracting. The really hard bit is getting a good sight...figuring exactly when the body is just touching the horizon. Andy Peregrine C&C 40
Andrew Burton 61 W Narragansett Newport, RI USA 02840 http://sites.google.com/site/andrewburtonyachtservices/ +401 965-5260 On Jan 27, 2013, at 2:13 PM, "Ronald B. Frerker" <rbfrer...@yahoo.com> wrote: > > Power Squadron. > When I took the courses, they covered the same material as the Naval Academy. > Ron > Wild Cheri > C&C 30 > STL > > > --- On Sun, 1/27/13, David Risch <davidrisc...@msn.com> wrote: > > From: David Risch <davidrisc...@msn.com> > Subject: Re: Stus-List Sextant > To: "CNC CNC" <cnc-list@cnc-list.com> > Date: Sunday, January 27, 2013, 1:10 PM > > Where are you located. I have a buddy who makes it very simple and fun. > He is in the NH/Ma area. > > David F. Risch > (401) 419-4650 (cell) > > > From: neil.eric.ander...@gmail.com > To: cnc-list@cnc-list.com > Date: Sun, 27 Jan 2013 14:04:32 -0500 > Subject: Re: Stus-List Sextant > > Anyone know where one can get training on how to use a sextant? I always get > nervous with things like You-Tube as you can’t always count on the provider > being knowledgeable. > > > > Neil > > FoxFire, 1982 C&C32 > > > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Chuck S > Sent: Sunday, January 27, 2013 1:24 PM > To: cnc-list@cnc-list.com > Subject: Stus-List Sextant > > > > My understanding is that the sextant measures the angle between the Moon or > Sun and the horizon. If you're careful reading the solar or lunor tables it > gives you the latitude where you are. Longitude is something else. I know > it requires a good timepiece, but how does one convert the time to longitude? > > > Chuck > Resolute > 1990 C&C 34R > Atlantic City, NJ > > From: "Frederick G Street" <f...@postaudio.net> > To: cnc-list@cnc-list.com > Sent: Sunday, January 27, 2013 12:16:33 PM > Subject: Re: Stus-List Mounting chartplotter now Compass Deviation > > Pricey little bugger… > > > > I picked up a slightly used Astra 3B several years ago on eBay, from a guy in > Malaysia. Nice wooden box (which I replaced with a Pelican case), and the > thing was smack on for calibration. One thing I did do was to replace the > old incandescent arc illumination lamp with a red LED; it required some redo > of the battery compartment in the handle, but I shouldn't have to change > batteries in a long time. > > > > Of course, it's not much use on Lake Superior -- as big as the lake is, you > can often see the mountains (large hills, actually) on the North and South > shores. I had a chance to run it through its paces on a trip to the Pacific > Northwest, where we actually had a decent horizon to play with. But I'd need > to get familiar with either the paper fix calculation charts or newer > celestial nav software in order to get even remotely proficient again. > > > > Still, it's a cool gizmo to keep around, in case I ever do get out to > bluewater; and it only cost me about $300 plus shipping. > > > Fred Street -- Minneapolis > S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^( > > > > On Jan 26, 2013, at 8:44 PM, Richard Davis <rdavis2...@me.com> wrote: > > > > Here is a nice metal sextant. > > > > http://www.landfallnavigation.com/-nhu01.html?cmp=pricegrabber&pg=-nhu01&utm_source=-nhu01&utm_medium=shopping%2Bengine&utm_campaign=pricegrabber > > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > > _______________________________________________ This List is provided by the > C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com > > -----Inline Attachment Follows----- > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
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