NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sunset sight?
From: Lynn H. Ogden
Date: 1998 Oct 29, 18:32 EST
From: Lynn H. Ogden
Date: 1998 Oct 29, 18:32 EST
-- [ From: Lynn H. & Kathy Ogden * EMC.Ver #2.5.3 ] -- I guess what we need to do here is define terms. Positioning to me equals fix or similar. Chuck is correct that using such a technique is useful in "life boat navigation", but life boat navigation tell you weather your closer to North America or Europe and which way to row. ;-) It's not something I'd want to use as my basis in making decisions in making a land fall. Likewise, some believe that a two body fix is also not accurate enough for making land fall. That's not to say that it hasn't been done. To answer your question about "how close": It depends on your ability to allow for the variables. LO -------- REPLY, Original message follows -------- Date: Thursday, 29-Oct-98 01:00 PM From: Richard Edwards \ Internet: (richard@XXX.XXX) To: Lynn H. & Kathy Ogden \ PRODIGY: (VJJN45A) Subject: Re: [Nml] Sunset sight? On Oct 28, 9:15pm, LYNN H OGDEN wrote: > Subject: Re: [Nml] Sunset sight? > -- [ From: Lynn H. & Kathy Ogden * EMC.Ver #2.5.3 ] -- > > It's possible, but not likely. There are too many variables created by > atmospheric conditions, refraction, and estimating semi-diameter and > when that semi-diameter is on the horizon. > How about in an emergency situation? How close could you come to a position? > Now azimuth or amplitude of the Sun is easy to find so that you may > correct your compass, but positioning is near impossible. > > > Subject: [Nml] Sunset sight? > > Would it be possible to find position (or at least longitutde), without > a sextant by marking the time at sunset and going to the tables with 0 > degrees as the altitude? > >-- End of excerpt from LYNN H OGDEN -------- REPLY, End of original message -------- <PRE> -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= =-= TO UNSUBSCRIBE, send this message to majordomo@XXX.XXX: =-= =-= navigation =-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= </PRE>