NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Say it aint so......
From: James N Wilson
Date: 2009 Mar 8, 19:19 -0700
From: James N Wilson
Date: 2009 Mar 8, 19:19 -0700
Guy: As a long time Power Squadron instructor, I have found that any sight reduction method they have taught is more accurate than the sight data. The three mile criterion was aimed at greater rigor in the sight taking process. When I was a student, I had no problem with Ageton for my JN sights with a five mile accuracy requirement, nor with HO 229 for my N sights with the three mile requirement. Now I take sights with my students, and have used the NASR method, and now the calculator, with no problems with accuracy. Having to plot a LOP to get the distance to or from the DR introduces another source of error, which Ageton, NASR and the calculator avoid. Incidentally, I'm surprised that the three mile accuracy requirement has been restored. I was at the meeting of the Power Squadron Offshore Navigation Committee where the decision was made to make the requirement five miles. I objected and was overruled. Jim Wilson ____________________________________________________________ Save on Digital Photography Serivces and Hardware. Click Now! --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---