NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2014 Apr 11, 14:47 -0700
Sean,
I get a local hour angle of zero at UT 17:06:57 on 11 April 2014 from the assumed position you provided. If the AP was a GPS position then you may have to check your watch error.
Greg Rudzinski
First Noon Sight: Astra IIIb
From: Sean C
Date: 2014 Apr 11, 12:48 -0700
Well, after mowing the lawn I managed to sneak over to the water for a noon sight. As promised, here is my data:
AP: N 37°02.5', W 076°29.3'
HoE: 11 ft.
Temp.: 79 °F
Press.: 30.13 inHg
Index Error: 0
Watch Error: 0
There wasn't too much glare on the water, so at first I didn't use any horizon shades. But after a few difficult sights, I tried using one shade and found it much easier to align the limb. After evaluating my sights, these are the only ones I considered:
___LMT________Hs(LL)_
13:02:16.....61°10.1'
13:03:29.....61°11.8'
13:08:20.....61°13.5'
13:13:19.....61°11.8'
13:15:31.....61°10.1'
_____________________
Time Zone: UT-4
Equation of Time: -1m 3s
Dec. of Sun: N 8°28.1'
SD of Sun: 15.9'
-Sean C.
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