NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Timesight near sunset?
From: Bruce J. Pennino
Date: 2013 Jan 11, 18:14 -0500
From: Bruce J. Pennino
Date: 2013 Jan 11, 18:14 -0500
Hello:
Just thinking further about this...... Until
this problem, I never really noticed that the altitude correction table was
really two tables, 10-90 and 0-10 degrees. I never thought about it
because I read somewhere it is "bad" practice to measure altitudes less than 20
degrees or so. We had good results with a time sight at sunset- a negative
angle. Also, I've had good results with LOPs measuring altitudes of
12- 15 *. This begs the question.... For reasonable results of
+/- 7 NM, what is the smallest sun sight altitude that can be measured
with a good horizon? Must be using an ordinary sextant, not one that measures to
10 seconds!
What if you are an explorer at 66* north this time
of year? No noon sight? Depend on stars? Just thinking aloud!
Bruce
----- Original Message -----From: Doug MacPhersonSent: Thursday, January 10, 2013 8:11 PMSubject: [NavList 21868] Re: Timesight at sunset?
Indeed. I was standing on the beach at Spencer Beach County Park in Kawaihae. :)
Sent from my iPhoneMarcel,
If the given latitude is correct then the intersection on the western shore is at 155* 49.5' W (Kawaihae). A place with some history.
Greg Rudzinski
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