NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant accuracies
From: Doug Royer
Date: 2003 Mar 17, 17:32 -0800
From: Doug Royer
Date: 2003 Mar 17, 17:32 -0800
In coastal pilotting these are known as Horizontal distance bearings.Pick 2 or more terrestial objects.Turn the sextant on it's side and take the angles between the 2 or 3 objects by superimposing one of the objects over one of the remaining objects.Dip is not a consideration in taking Horizontal angles. Write the angles down and go to the chart.With dividers find the distances between each of the objects.Your position will be tangental to the distance between the objects.Calculate the distance off,using dividers from each point draw in the radius and where the lines intersect is your position. -----Original Message----- From: Peter Fogg [mailto:ffive@TPG.COM.AU] Sent: Monday, March 17, 2003 16:14 To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Subject: Re: Sextant accuracies > From: Rodney Myrvaagnes> That doesn't mean you couldn't use a sextant. You just have to turn it > on its side. The angle between two charted objects generates a good > circular LOP. Could you go into a little more detail about this please > A three-legged protractor can be used if you can see > three charted objects. > this too - never came across of these beasties - sounds vicious ..